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Lighten my bike or new XC build

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That's actually a pretty good representation of how it is. it's more purple in sunlight, from what I can remember, it's been a little while since the sun shone.

I was impressed with how compact the fox remote is, having played about with rockshox trigger remote I feared it woud be as unecesssarily humongous.

I ended up getting a Hope stainless PF41/30mm BB from CRC in the sale, removing the DUB BB was a bit of a chore. a heavy hammer and a headset cup remover.

https://www.ebay.co.uk/itm/364709798503 something like that.

you have to hit  it very hard and it knackers the old BB. it's horrible hitting something in a carbon frame. but there's a reassuring amount of material holding the cups in.


 
Posted : 28/03/2024 12:20 pm
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I would be tempted to just remove the cables and lockout from the bars. I assume if you loosen the grub screw and release the cable the front and rear shock are set to open by default ? TBH I never really use lock out anyway.


 
Posted : 28/03/2024 2:09 pm
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yeah they're push to lock, so sprung normally open.


 
Posted : 28/03/2024 4:48 pm
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"lovewookie" any ideas in the front fork topcap for the SID ? If I do buy one it would be the XRM 6.9


 
Posted : 28/03/2024 9:16 pm
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Its a damper change I think for SIDS, or get top cap and somehow remove a spring in the damper cart.


 
Posted : 28/03/2024 9:31 pm
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yeah, the charger remote damper has a different head to the manual one. it has a hex bolt had rather than the threaded stub that the lockout knobs fits onto on the manual version.

I've not played about with them enough to  know if it's something you can retrofit to a remote charger damper, but I suspect not.


 
Posted : 29/03/2024 12:52 pm
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the sidluxe shock however, if you can find parts https://www.tnc-hamburg.com/TNC-Shop/Daempfer-Federbeine/RockShox-Daempfer/Rock-Shox-SID-Daempfer/SID-Daempfer-Ersatzteile/RockShox-SIDLuxe-Daempfer-3Position-A2-Ersatzteil-Umbaukit-auf-Hebelbedienung--60815.html

looks like the lockoutshaft is replaceable.

I don't know if it's the same on SIDLuxe, but the RS monarch shocks you didn't need to pressurise with nitrogen (but was recommended ideally), you can just use a shock pump to pressurise the damper making home servicing a little more feasible. hough you will need the screw in adapter for it, which is the same thing that used to be used for late 90's RS air forks IIRC.


 
Posted : 29/03/2024 1:00 pm
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@lovewookie (or anyone else) did you get a chance to ride it in the nice weather today? I still haven't had a chance to set it up tubeless, add some mudguards etc. The remote lockout on the rear shock is not really working, possibly the cable just needs tightening - how much should the blue lockout wheel rotate when fully engaged? Mine is only going about 30 degrees.


 
Posted : 30/03/2024 8:57 pm
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I've not worked out of it's a 2 or 3 position remote yet. Race tomorrow then next week start swapping bits onto the XR.

Had the crank out today for a ring change, damn dub is hard to get moving. Also looked inside the seat tube and you'll be pleased to hear that the dropper routing is in a little pipe (so should not require the BB to be removed). Felt like the same for the rear brake when I removed that.


 
Posted : 30/03/2024 10:34 pm
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you’ll be pleased to hear that the dropper routing is in a little pipe

That is good news.

Its a 3 poistion remote on the fox shocks.

Mines gettingban outing today. 15deg and sunshine 🙂


 
Posted : 31/03/2024 10:32 am
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Be interested to hear how it rides.


 
Posted : 31/03/2024 12:54 pm
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20240331_131514a

Very nice couple of hours out on the 7.9 yesterday.

It's a pretty decent allround xc bike. climbs well, relatively active, but not noticably bobby, light, climbing traction seems to be good too.

Confident descender too. yesterdays ride included a long fast rocky descent and it handled it really well. I think I need to spend a little more time setting up the forks, as i found them a little unbalanced to the rear, but I'll fettle a bit more..

the low front end isn't actually that low once you get on it. There's plenty of scope for adjustment too. I think mine is slightly too high as I started to get a bit of neck pain after about an hour 20. This is not unque to this bike, I started to get it a couple of years ago with some bikes and have been pretty sensitive to bar/saddle height since.

Low BB had me strike pedals a couple of times running 175 cranks. may have been my poor technique, or being used to 15 year old bike geometry.

all in, it's a bike that kinda just gets on with being a bike. I'm pretty happy with it. (for now ;-))


 
Posted : 01/04/2024 1:05 pm
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Sounds positive 👍.

I think I've weighed every part now. Will post the break down at some point.


 
Posted : 01/04/2024 6:45 pm
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I think I’ve weighed every part now. Will post the break down at some point.

I am that sad that I'm looking forward to this. still stuck in a 90's weightweenie world..


 
Posted : 02/04/2024 1:28 pm
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I'm going to pretend I only did it as the scales were to hand but I'd be lying :D.

  • Sram level TL front 253g
  • Sram level TL rear 276g
  • 180mm centreline rotor 145g
  • 160mm centreline rotor 113g
  • Eagle X01 12s rear derailleur 287g
  • GX eagle boost dub cranks with 34 ring 638g
  • GX eagle shifter 130g
  • SRAM XG1275 cassette 461g
  • Maxxis Rekon Race EXO TR 29x2.35 852g, 876g
  • DT Swiss X1900 Spline - 29''*25c boost 6 bolts F 890g R 1007g
  • Tubes! 435g
  • fizi:k taiga 273g
  • Seatpost 293g
  • Grips 114g
  • Fox 32 SC Perf-Series Float 3 Pos /remote boost, 100mm travel (29''), 44mm rake 1530g (inc 175mm steerer, star nut, crown race, remote cable)
  • Bars 147g
  • 70mm stem 103g
  • Spacers 16g
  • TopCap 14g
  • Frame with headset, shock, axle, bb, seat binder some cable outer 2800g
  • Rotor bolts x12 25g
  • Chain 255g

That lot comes to 11.65kg so slightly out from all up weight of 11.6kg. I did not disconnect the shock remotes though which made weighing the forks interesting and the frame was difficult to balance.


 
Posted : 02/04/2024 3:13 pm
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Tubes! 435g

How much does tubeless sealant weigh?

My commuter has tubeless wheels and tyres but came with tubes. I've not got round to changing them. Two punctures in 9 months, both of which would have sealed tubeless has me wondering again.


 
Posted : 02/04/2024 3:49 pm
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100g a wheel maybe. Depends how much you put in.

Edit "all up weight of 11.6kg" should be 11.9kg.


 
Posted : 02/04/2024 4:02 pm
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I also just pulled the trigger on the XR 7.9

I'm not sure if I'm glad or not that they're out of stock of large!  Part of me is beginning to fall out of love with gravel bikes and fancies going 95% as quick but without getting beaten up.

How much does tubeless sealant weigh?

100-150g depends how lucky you're feeling TBH.  You can run them without (or with very little, <50g if they're slightly porous) sealant and they'll still be as or more puncture resistant than a normal tyre and tube.


 
Posted : 02/04/2024 4:07 pm
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those tubes, that was the first thing I noticed, good god they feel heavy in hand.

that's a great list. I can see where I can shed a bit of weight if I feel inclined. obviously it makes all the difference despite being the wrong side of 90kg's 🙂


 
Posted : 02/04/2024 5:05 pm
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We bought one (the XR7.9 Race) for our eldest for his 12th birthday, fair to say he loves it. He's on a small, his came with FSA SL-K carbon bars and the same Level TL brakes as the others, I swapped the chainring from the 34t supplied to a 32t I had in the spares box, he'll probably get a set of ESi grips on it eventually and fit his dropper also at some point.

We were going to swap the stock wheels to his Silt XC alloys, but he likes the look of the DT ones so they got set up tubeless with the supplied Maxxis Rekon Race's. He hasn't been off it since he got it and as you can see, he's not shy of a bit of mud 😀

[img] [/img]


 
Posted : 02/04/2024 5:27 pm
hardtailonly, lovewookie, lovewookie and 1 people reacted
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Nice, he looks really happy with it!

I've half looked at the size chart for our eldest but she is still sub 150cm.


 
Posted : 02/04/2024 8:33 pm
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@nixie he's bang on 5ft / 152cm if you need a size guide.

How tall are you on the XL?


 
Posted : 02/04/2024 9:50 pm
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Im 6'2 on the XL


 
Posted : 02/04/2024 10:32 pm
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185cm, just under 6'2".

Interesting, I'd have put him taller than that from the pic. Maybe time for a height check.


 
Posted : 02/04/2024 11:01 pm
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His proportions are similar to mine, quite long legs for his height so the saddle height looks high for his actual height.


 
Posted : 02/04/2024 11:04 pm
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Finally had some time to start setting up the bike. Not a whole lot of clearance between the fork crown and 2.35" tyre at the front, when I tried out the Proguard that has been good on another bike, there's not enough clearance. What front mudguards are people using? @steve_b77 looks like your son is not running mudguards 😀 @lovewookie you seem to have one? Crud XL looks like it would work as it mounts around the crown rather than under it


 
Posted : 03/04/2024 12:16 am
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I'm planning to run a mucky nutz face fender. Want something to protect the seals and take care of at least some of the spray. Shame there is no bolt on solution as the required holes seem to be there. Presumably the lack of clearance (width) is one way the fork weight is reduced. They look skinner than an old non boost forks 😁.


 
Posted : 03/04/2024 9:25 am
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I've got a lifeline plastic bendy generic zip tie to your fork one. there's not as much clearance as there is on a RS fork, but there's enough for my 2.35 nobby nic.

The rear of the bike has a nice mud shelf at the BB too 😉

Crud guard on the back so far. not sure I want to fit my mudhugger to it, and I dont think the win wing will be in the right place if I fit that.

need a wider win wing for dropped stays, they're great for dealing with the majority of mud.


 
Posted : 03/04/2024 12:40 pm
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They look skinner than an old non boost forks

They're the same width, but the StepCast at the bottom gives you the 110mm axle spacing.


 
Posted : 03/04/2024 3:46 pm
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I like the look of the XRM 6.9.... but I can't get past that front end mess with the handlebar lockout. Is it as bad as it looks from the website pics? Looks like a really over complicated front end with the lockout and dropper lever.


 
Posted : 03/04/2024 9:15 pm
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I was going to post a pic of the finished cabling on mine, except it's not finished. Found the rear Magura caliper does not fit in the frame! Worse still discovered that after cutting and threading the hose 😭.

Anyone know what the max rotor size is for this frame? May have to resort to a 180mm.


 
Posted : 04/04/2024 10:53 pm
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I wouldn't mind betting its 160mm as the XRM is specc'd with the same size rotors as the XR irrespective of frame size.


 
Posted : 05/04/2024 1:43 pm
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Yeah wouldn't surprise me either.


 
Posted : 05/04/2024 3:20 pm
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Finally had a chance to go for a big ride with the XR 7.9 today. Impressions very positive coming from my old-school hardtail. The place I noticed the most benefit was on technical climbing, the bike was a beast at that. The geometry feels comfortable for me and I only needed a few tweaks to dial it in perfectly.

@lovewookie You were definitely right about the mud shelf, I had to clear this out multiple times during the ride, seems like it's a normal feature of this type of design though?


 
Posted : 06/04/2024 11:44 pm
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Weight weenies will be horrified but I've already added 1kg to the bike:

  • Forekaster front tire to get us through hopefully this final month of horrible mud
  • Big coverage mudguards. Crud XL fits on the front but it sticks out at an angle for some reason, trying not to be OCD about it
  • Brand-X Ascend dropper, 150mm just a smidge too high so I went for 125mm (to fit tomorrow)
  • Alloy 760mm handlebar. I thought about it and just don't feel super comfortable riding a lightweight carbon handlebar from a brand that's not talked about in this forum. It's most likely fine, but I figure I'll ride more confidently with an alloy handlebar from a trusted brand.

 
Posted : 06/04/2024 11:48 pm
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You were definitely right about the mud shelf, I had to clear this out multiple times during the ride, seems like it’s a normal feature of this type of design though?

yeah, anything with a brace there will collect mud.

just don’t feel super comfortable riding a lightweight carbon handlebar from a brand that’s not talked about in this forum.

Mine came with a FSA SL-K, which is a bit of a weighty beast for a carbon bar. specs wise FSA say it's 215g, vs 145g for the progress carbon bar it's supposed to come with.

they are sold on tradeinn, but that doens't mean much as they sell odd brand tyres too....


 
Posted : 09/04/2024 4:57 pm
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Mine came with a FSA SL-K, which is a bit of a weighty beast for a carbon bar. specs wise FSA say it’s 215g, vs 145g for the progress carbon bar it’s supposed to come with.

I got the Progress bar from the official spec, FSA seems to be a more recognised brand


 
Posted : 09/04/2024 5:17 pm
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Is anyone with an XR in the XL (or L?) size able to comment on sizing? Does it feel like a long bike?
I’m right on the border between L and XL at 184cm, but with a longer torso and arms than average (ape gene!)  Currently on a long Large Giant from 2012, so not much in modern geometry to compare with…but XL on road and cross bikes.

Obviously only XL is available, so it’s a go/no-go decision and none in stock anywhere convenient to try out


 
Posted : 09/04/2024 11:46 pm
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I'm 185cm but (I think) balanced proportions. I have to caveat that I've not yet ridden the XL but have sat on in a fair few times. I was slightly worried about the length prior to sitting but it does not feel as long as I expected (for comparison my trail bike is an aether 9 in L which has a longer reach, shorter stem and wider bars). I've got a 180mm one up dropper fitted which I think should be ok at it's max length (think because not 100% decided on which cranks I'll run yet).

Where are you in the country @import?


 
Posted : 10/04/2024 8:09 am
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I'm 6'2, short legs long torso and tend to go for long bikes.

I have a XL, doesn't feel overly long, but it's not cramped either. the 70mm stem it came with seems to be decent size for me, which is nice.

By comparison, I had a Carbonda/vitus FS in large, as the seat tube on the XL is daft, like 540mm. reach on that Large however was 500mm, seat tube was 480mm, but it felt really short and awkward, and a bit weird. But I guess a lot of my riding is done sat down, so a long, slack bike with a steep seat tube  didn't really work for me.

problem I have with XL bikes is that a lot of them are 21" which is a bit long for my legs, but have a good reach. The XL is possibly slightly tall seat tube at 20"+ a bit., but the standover is massive so the only compromise for me is that if I run a dropper, it'll be restricted to a shorter drop. However, I don't really like droppers, not long ones anyway, so it suits the purpose of a XC bike.


 
Posted : 10/04/2024 12:46 pm
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@lovewookie you could have been describing my proportions too. I've fitted a 125mm dropper and that's about right. Makes me happier I didn't go for that Vitus Rapide FS, did you sell yours because you didn't get on with the fit?

@import I'm just a few cm taller than you and the bike fit is great, doesn't feel like I'm at the bottom end of a range and doesn't feel super long. But bear in mind I'm coming from road biking so the lower front end XC geometry suits me and I don't have much experience with comparable FS bikes.


 
Posted : 10/04/2024 3:41 pm
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. Makes me happier I didn’t go for that Vitus Rapide FS, did you sell yours because you didn’t get on with the fit?

yeah, I think I may have been better on the XL, but I'd have only had about 220mm post showing as my legs are quite short. hindsight it would have probably been ok, as standover was massive. it's a proper dilemma being inbetween sizes.

I struggled a bit with the slack head angle, to get to feel comfy I needd a 70mm stem, but anything over 60mm and it felt floppy. The 76deg seat angle was a bit odd at first, I could push the saddle back on the rails to get comfy but it compromised the alreay active suspension too much with my weight far back. again, a XL, at 20mm longer may have solved that and enabled me to ride more neutral over the BB and cope with a 60mm stem or less

I also didn't like where the saddle was when riding undulating stuff. I don't use droppers, but the long bikes really need them to be able to maximise being able to move about the bike. It was just in the way, and that just annoyed me more.

The XR7.9 doesn't seem to suffer from any of that. I can move about the bike well enough, the head angle is slacker than I'm used to, but feels stable rather than flopping about and it's got enough progression in the rear suspension to get on with letting me pedal.

The closest feeling bike I've had to it is my very old canondale scalpel, the one with the shock behind the seat tube. I'd managed to pick up an XL of those so it was long, but had a dropped top tube so decent standover and suspension that did the job to remove rattle and minor hits. it was perfect for 90% of what I rode and the other 10% I could mince my way down anyway. The 7.9 is like that, but more squish.


 
Posted : 11/04/2024 10:34 am
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Pretty much ready for the first ride tonight now. Saddle height set with the 180mm dropper and still have some post insertion to play with if it ends up being a little high. Can't wait!


 
Posted : 11/04/2024 3:08 pm
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First up built and ready to ride weight was 12.1Kg inc pedals. That is with some obvious fat to be trimmed out of the cranks, pedals and dropper before the big one of the wheels. Happy with that as I'm now on a lighter bike thatn the start of the thread but have gained rear suspension :D.

As for the actual ride size wise it felt good, I didn't have to adjust the post (other than when it slipped down, need some carbon paste) and the length was good. I was noticeably in a lower racey position compared to either of my other bikes and felt mostly comfortable in that position. It is going to take a bit of getting used and I definitely need to adjust the saddle as it felt like I was being pushed onto my hands too much at times. Moving the bike felt nice and sprightly. Climbing over roots or going along a rooty section felt good with less slipping than the hardtail. Going down I was more cautious on, its been a while since I've been on anything with a stem this long so need to build some confidence there. The local wood's trails are similar in nature to XC tracks and I didn't notice anything that concerned me. The rear suspension just quietly gets on with its job though the rebound needs a bit of adjusting as I think it's a bit fast currently. All in I'm happy with the change, now just need to get some saddle time on it before the next race to build confidence.


 
Posted : 12/04/2024 3:20 pm
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