rd - any good on chalky/flint trails?
No idea, it's all Loam/clay & roots around here
either way you're going to be wanting some winter tyres
When the Dune first came out JJs were about £80 but they've come way down since so it's not the big excitement it was. Annoyed about that tbh, I meant to sell one of mine but didn't get round to it til after the price drop.
Has the Juggernaut Pro even made it to retail in the UK yet? I think there'll be some folks keen to get their hands on that, if you decide you don't like it.
good point - they are hard to find! Best I could do was find a pair in the US priced at around £95.
I'll hold out for some super cheap floaters unless I read of any other bargains in the mean time.
I got my juggernauts from ridewill in Italy
Have you been able to compare them with JJs by any chance? And, any downsides to the weight? I think the original ones they sent out to reviewers basically fell apart instantly... I've got quite used to my 4.8s but I wouldn't mind shedding a kilo of tyre sometimes 😯
(ridewill are sold out btw)
Blow me those are some low profile knobbles!
I've a set of Floaters I picked up in the On-One sale I was saving for my next bike if you fancy a swap thisisnotaspoon@yahoo.co.uk
either way you're going to be wanting some winter tyres
yeah, in 6 months time (fingers crossed!)
I'll hold out for some super cheap floaters
they've been £15 each in their "liquidation" sale, sure they will be again.
I've a set of Floaters I picked up in the On-One sale I was saving for my next bike if you fancy a swap
surely there's a 😆 missing off the end of that?
The juggernaut sport I had a go on felt utterly horrible, I'd risk the cost of a set of floaters to see if the pro is any better but I'd not be paying anywhere near shop prices to take that gamble! If they're any good then I'm up a set of lightweight tyres good for smooth trails with no sharp rocks, if they're as bad as the sport I've lost a set of reasnoble tyres and gained some unusable lightweight one good for weight weenieing only.surely there's a missing off the end of that?
damn - now im caught in a struggle between giving them a trial, or keeping them new and passing them on..
I had hilarious results with my fat arse and a set of Maxxis Minotaurs a few years ago.. I don't tend to do so well with low profile tread patterns!
rd - any good on chalky/flint trails?
The JJs are great on loose flint/chalk round my bit of the Downs, and the Dune a brilliant bike on same, but as I found to my (hand/glove's) cost, they pick up clay and keep it until they meet their friend Mr Clay, and with exactly zero friction between the two, find a teeny camber and you're eating dirt lightning fast. Cue hole in glove and hand, Mr Flint!
When the tyre wasn't clagged or submerged in deep mud (it won't move once it gets too deep) it was okay, but although I think it was the clay/clay combo, there's a definite pucker factor in any mud since! I'm thinking of some Nates for winter, or the 4.0 Minions if they ever appear.
damn - now im caught in a struggle between giving them a trial, or keeping them new and passing them on..
try em, if you don't like em sell em on - they'll be used yes but unlikely to show any wear in the time it takes you to decide whether you like em. Given their rrp and lack of availability you'll still sell em at a decent price to someone keen to drop weight. Floaters are currently showing as £29.99, but I bought one at £20 and one at closer to £15 when they were in their liquidation sales the last few weeks and have em sat as cheap spares in the garage.
If you don't go tubeless then the Schwalbe 26" x 3" FR tubes mentioned earlier in the thread are a good way to lose weight (~180g each, OE tubes tend to be closer to 450g).
Juggernaut Pro 4.0s are ~830g and Jumbo Jim liteskin 4.0s are ~990g.
I gave up waiting for Pros to hit the UK at sub-£50 per tyre and chose JJ snakeskin 4.0s (1093/1130g) instead for £40 each in the Ebay 20% sale at Easter.
I finally got round to fitting them and the sv13f tubes yesterday, but things did not entirely work out... The tube I used on the front blew at an incredibly low pressure while inflating, dismantling showed a ~4" split along one of the seams ~4" from the valve. 🙁
Still trying to decide whether to try and get a replacement or just write it off, I reckon it is the first thing I've bought online that has gone wrong within a reasonable timeframe of use! 😯
If it's any consolation I've been using the 13Fs in 4.0 JJs since Feb without any problems. Imo the lack pf friction between the tyre and the tube makes the trails come alive *cough*.
Bad luck your 13F burst but I think that's all it is
Well, for anyone that's possibly interested, here's what a large Dune looks like:
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And out of the box:
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And weight complete with reflectors, bell etc:
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First impressions of trundle around the street, feel suprisingly like a bike! Handles completely normally at low speed, you can feel a stronger gyroscopic effect in place when turning at slightly higher speeds, but I'm sure I'll get used to it quickly. Tyres are over inflated currently so will tweak tomorrow and go for a spin off road.
I've tightened the BB axle bolts and drop out bolts, and reset the callipers (I'd rather have paid a tenner less and received no brakes, they're shite!) . What other things should I perhaps consider before setting off on a phone adventure?
I've already dropped about 400g ditching the naff plastic bits that were hanging off it, and switching the rotors to a new set I had laying around waiting for the right bike to show up.
Spare tube?
Good point, may hunt down some of those that CTM listed above
[url= https://farm8.staticflickr.com/7421/26851410085_15af817ac7_b.jp g" target="_blank">https://farm8.staticflickr.com/7421/26851410085_15af817ac7_b.jp g"/> [/img][/url][url= https://flic.kr/p/GULuJi ]Last of the bluebells ride[/url] by [url= https://www.flickr.com/photos/alexleigh/ ]Alex Leigh[/url], on Flickr
[url= https://farm8.staticflickr.com/7438/26757567512_cca010162e_b.jp g" target="_blank">https://farm8.staticflickr.com/7438/26757567512_cca010162e_b.jp g"/> [/img][/url][url= https://flic.kr/p/GLtwAU ]Last of the bluebells ride[/url] by [url= https://www.flickr.com/photos/alexleigh/ ]Alex Leigh[/url], on Flickr
Had mine out today for the first time in a month and the first time EVER on dry trails (back on the JJs now). Even got a PR on some flowy singletrack, the grip is immense. You sort of forget that. And the bit where you go from 'floating' to 'battering'.
I'm sort of torn between buying a bluto for it, or buying a large frame and swapping my bits onto it. But then I'd have one medium frame with two brand new sets of original gear... this doesn't seem to make any sense at alL!
Sell it and buy a large? You'd probably get a good price for the med
I love my OO fatty. I haven't ridden any of my other bikes on my local rides since I've had it. I think of it as a "pedal powered tractor" when I'm riding it. It handles some extremely rough and well horsed local bridleways, which would be un-rideable on my other bikes, with ease
I think I spent 650 quid building it up in the end, taking advantage of the frame at £130 in the Xmas day sale and the floaters for £20 each in another sale really helped keep the cost down. More than a Dune but not by much.
Having said that if I were looking now I'd definitely go for a large Dune.
digital pressure gauge. 1 psi makes all the differenceWhat other things should I perhaps consider before setting off on a phone adventure?
I'm heavy. How much should I account for extra PSI according to my weight?
When do you know you've hit the sweet spot with regards to tyre pressure?
Looking good!
TBH you just need to fanny about with pressures- I tried to use Internet Advice but it doesn't work at all for fatbikes because it depends too much on what you ride. I got a load of comments from wellmeaning beach riders and flatted pretty much instantly. Work down til you puncture! Fatbike flats are a total pain in the arse, so if you don't already have a big bag pump like a morph or truflo telescopic then I would definitely recommend it...
Just occured to me that Kenda missed the opportunity to name those the Big Block. I can only assume they've got a knobblier one on the way, otherwise they're idiots
I'm heavy. How much should I account for extra PSI according to my weight?
15 stone with 4.8s and I run 5psi / 9.5psi front / back.
When do you know you've hit the sweet spot with regards to tyre pressure
What it feels like and Strava.
Just been on the GO Outdoors website and it says:-
The Dune Bike comes with Kenda Juggernaught Pro tyres and NOT Schwalbe Jumbo Jims as shown.
Noticed this above the spec rundown
When do you know you've hit the sweet spot with regards to tyre pressure?
The fat tyre contact patch is lateral. The sweet spot allows them to deform for max grip and minimum rolling resistance. Unlike thin tyres if you pump them up too hard the contact patch becomes more longitudinal and they drag like hell. If they're too soft the tyre starts to tuck while cornering. Just start with some random single figure pressure like 7 or 8 psi and adjust to suit. 1 psi at fat tyre volume is a lot of air
Well spotted crushbrother.
Ok, I need to stock up on tubes and a large volume pump.
Just went for a cruise down to the local shop, it certainly is a headturner. Feels great so far, although tyre pressures are high and it rolls really fast. Be interesting to see how much drag there is when I let some air out.
Tyres make such a THRUMMMMM! On Tarmac eh?!
Right, what's the best way to go 1x10 on this Dune freewheel?
Also, is the freewheel easily replaceable, or even upgradeable?
Oh, and is the crank 104bcd?
It's a pretty normal freehub so it'll take any cassette. And yep 104.
I'd be surprised if you don't find an interchangable freehub on other wheels but I don't know of any that are a direct fit. Mine's been fine tbh- the bearings were gash in the rear hub mind. It's roughly the same design as the DT Swiss 3-pawl hubs but not the same dimensions I think. I see some reliability grumbles on the net mind...
But for now, it's just a freehub, it'll take any normal cassette.
Ditto what was said about investing in one of those Topeak digital guages.
Not a fat owner, but on my 29+/b+ behemoth, down at 10-14 psi, it makes a noticeable difference dropping or upping a couple of psi.
That's the one - they're £24.99 in Cycle Scourgery, and I couldn't find anywhere much cheaper that had them available within a few days.
Sorted. Have bought tubes and digital gauge.
Went for a spin this afrernoon, never had so many people comment in my life. They can't help themselves!
Loving how the bike feels, it must go like stink when stripped of a bit of weight. So weird riding between hard pack and grass and barely noticed a difference in drag, it just keeps going!
I had mine up the golfy today, got some funny looks popping out the bottom of 3G 😆 Definitely found the limits of the 4.8 JJ though, completely useless today- it was dry but crumbly so it just found no grip at all.
I have no other reference for grip other than these Kenda's, I'm sure I'll find their limit once we get a fresh downpour as the tread profile is so low. No idea what set to buy as an alternative yet.
NW - have you got 4.8s front and rear? Can see how a 5.0 would possibly fit up front but not sure about out back.
Took on a short staircase today, kind of expected the Dune to take it in its stride, but was quickly reminded that I on a fully rigid bike, and longed for my dropper post.
Tyres came fitted with high pressures so have been gradually leaching them. Have now got a satisfying amount of squish - but immediately noticed a bit of auto-wandering at the front once it went below a certain pressure. Eases off when you pick up the pace.
Aye, 4.8s front and back- Minion out front and JJ in the back. Well, none of them are actually 4.8 wide but they're all claimed. 4.8 rear might be tricky with a 2x setup but it's grand with 1x.
The Bud nearly doesn't fit- if you increase the pressures up high, it grows so much that it jams in the wee bolt eyelet at the top of the seatstays. But at normal pressures it shrinks. Kind of mad tbh! So, I've a feeling a true 4.8 might just be too big.
No idea how big you can go in hte front. Big!
How do you find the extra width?.. Much benefit all round?
For the stuff I ride, it's just plain better IMO, they've got more bounce and more grip and the drag's no great drawback. Simple as that. But I fatbike stupidly, today like I say I was up the golfy at innerleithen riding ews race stages, for teh lulz. The correct answer, up there, is a 2.3-2.5 tyre and some suspensions so 4.8 is just a better wrong answer really...
Vee Rubber Vee8 folders are £19.99 in the CRC sale. Fairly mixed reviews, seems like they could be ok for SDW type trails. Anyone used them?
I found that entering a quagmire at speed with my Floaters the front would do that sideways slip. Anyone else experienced this and what tyre is not so prone to it?
(TBH Bonty Muds are the only tyre I've not experienced this with.)
The brown On-One Floaters are currently £19.99 each, the other colours are ~£25 and the default black version (better compound performance due to lack of colouring?) is ~£30.
I'm still torn whether to buy a pair of Fat Not Fat 29er wheels for ~£120. Still trying to determine if the front wheel is RDS or FDS.
You guys might want to look at CRC, especially if you have British Cyling membership (10% off), they have custom Hope wheel builds including fat bike hubs.
I'm thinking about trying 4.8 up front and maybe keeping 4 or 4.5 at the rear, leaving a little more room at the back for clearance.
Have read that the J Js are good in dry conditions but not so good in mud. Ideally I'd like to fit a set of all rounders as I'm less inclined to faff with tyres once they're fitted. what are the obvious choices?
I like the sound of the Minuon FBF up front as its sounds really grippy and I want to hunt for the limits of cornering grip. Also sounds pretty heavy though?
Are there any Mud X for Fat?
Are the surly tyres (good range at Charlie the monger) good for trail action?
For mud, most folks recommend the Nate (3.8) or Bud (4.8). I have a Bud, it's very good but it's also very damped- which should be good, it gives you more control and less bounce but for me it sucks the life out of the bike, and also it's really low on feedback so it's hard to trust when you're pushing on a bit.Minion isn't quite as grippy in mud as the Bud, but, it's more predictable so I can work the grip it has better. They're both more or less the same weight and yep, heavy but that's just pretty much how it is, for fatbikes.
Haven't used a Nate. Makes sense to me, the wider the tyre the more float it has and that's not always good so maybe the narrower 3.8 works better.
Cheers NW, it's all beginning to make sense. Picked up a folding Fat B nimble for £39 earlier which seems a really good price. Will probably use that on the rear and save the juggernauts for Sunday best..
Might try your FBF up front.
I'm have been running mate upfront with a FBN out back for a while now. Great combo, I found Nate front and rear very draggy and like Made the bike feel very lethargic. The FBN rolls nicely but is heavy, I have just purchased a second hand Jim from Northwind to run on the rear which is lighter still. Hoping that will liven things up even more.