[Closed] 650b+ (and other plus sizes if you like) - rim, tyre, frame, fork combinations,

Too wide for a Reba I think but there's an Aus Ebay Power Seller (came up on the UK site) got some EXO Chronicles silly cheap (29 & 650), hope they're legit!

I keep chopping and changing, started out with skinny 2.2s on some Mavic rims, 29+ front, 29+ front/27.5+ rear and now back on skinnies. Want to try 27.5+ front and back next but not overly impressed with the tyre choice available at the minute, rim wise I have been using Mulefuts and one of those Kris Holm 29er rims, it's very strong but weighs only slightly less than the moon.

it's very strong but weighs only slightly less than the moon.

one reason Im inclined to stick to 650b+ with TBs as these dont weigh much.

Maybe I'll get a chronicle s/h and put it on a normal 20mm rim and see what happens.

I tried a chronicle in a Pacenti dl31 rim (think it's around 25mm internal) and couldn't get it to sit right, but a Knard is fine even though it's meant to be a bit bigger? Maybe a dirt wizard would be better, little bit smaller but pretty draggy in the dry.

there's a guy in the classifieds trying to shift a knard and rabbit hole for £210 which is a bit rich really.

Does the chronicle not like narrow rims then?

Didn't seem to, I did get the bead on equally all the way round the rim but it always felt a bit precarious for some reason.

£210 does see a little high, think Charlie does a new build kit including tyre for around £250.

The Buzzard is currently in a Frankenbike state.

A failed hub has left me with a 26'' rear wheel with a Conti 2.4 Rubber Queen.

It rides better than I would have hoped and is actually great for wheelies...

Great day out in the Autumn sunshine today..... I will try and sort those clearances photos...

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Considering taking it to Afan next month, where I've always used my Spesh Pitch, so I'll see how I fare on the monster fire road climbs and rockier terrain. Hoping well as I'm not convinced on using 2.5" inner tubes if something dreadful happens to a tyre

BTW Matt, I can't seem to send to your email

Rich I bust my collar bone on Saturday so won't be riding with you this weekend. Have a good one.

I took my Nimble 9 on 2.3 tyres to Afan a while ago full of 'hardtails can do anything bravado', and hands up I got pretty shaken up on The Wall, it wasn't the best experience.

But I reckon B+ may well be a different ballgame, a lot of that shaky trailcrap will be mitigated better by soft tyre volume than a shock could. I say give it a go!

MTFU - I'm pretty sure that hardtails at Afan is hardly that extreme 😉

That said, I am quite looking forward to riding a trailcentre on b+ just because I'm really enjoying riding the bike that way.

@Stoner - not silly-cheap, but next day tyres have 29 Chronicles for £55 a pop...ended up getting a pair from them rather than alltricks (think they were a fiver cheaper).

http://nextdaytyres.co.uk/details.aspx/MAXXIS-CHRONICLE-MTB-29/1168

Interesting reading about problems seating on DL31s...grabbed a cheap pair from SS until I get something wider sorted out, will see how/if they go up OK at the weekend. Might finally get the Rooster finished... 🙂

So has anyone actually ridden a Spesh Purgatory b+ 3.0 in sloppy and/or claggy mud? Any good?

Nope but I can confirm that leaning a vee Trax fatty over on some slop was pretty useless.

That purgatory looks interesting

A Butcher-lite would be nice if Spesh are getting into this market. 2.8 ish would probably do.

@Nemesis, not ridden yet, still waiting on the frame, but certainly looks a lot grippier than a trailblazer. Frame is due next week, all the bits ready to go on, so should be able to report soon after

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Literally just got off the phone ordering the same. Not sure if it will fit into a 29" fork...

Thomas George, what's the max width of that? About 75mm?

Trying to work out what tyres to get for my i35's to fit into Revs..
I really want the Purgatory but not sure what the clearance will be like.

thomasgeorge- could you measure the width of your setup please?

Likewise, Purg looks OK, thx for pics, a bit beefier than 29x2.3. If it clears a 29er Pike on an i35 I want one.

Thanks guys - Think I may just take a punt on them since they're reasonably priced (£45 unless anyone's seen better).

How wide/tall is that set up, thomas (and how wide is the rim internal width)?

I've got revs and 38mm rims. I'm a touch worried the bulge may foul the tyre. I'll find out soon enough!

45 pounds from my local spec dealer, much cheaper than the trax fatty

They were 75.2 measured with a digital vernier, and the Derby rims are 40mm external, about 35mm internal. They are on boost size hubs, but I'll see if I can get them in my 29er pikes later, and report back.

That would be great. I suspect they will fit in pikes, maybe not revs though....

Do 2011 revelations have more clearance at the arch than similar age rebas (both pre-black stanchion era forks)?

I'm just building a wtb i35/i29 combo, and have a choice of forks. If the rev would let me use a 3" tyre I'll go with that...

Also, what tape are people using for tubeless for these wide rims. The i35s are huge compared to flows which is as wide as I've gone before...

Thanks thomas.

ian - you're welcome to try out my wheels in your frame/fork though it's maybe a little bit of a trek these days.

I just used standard tape but only for 25mm internal - for wider rims I'd just double it over I reckon.

Clearance at the arch isn't an issue. There is a bulge by the dust seals that's an issue

Yeah, they are the bit's I'm worried about..
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Alexh- mine are in the post. Do you have a set at home you could measure the gap on please?

I'd say the 29er Pike minimum spacing is about 71mm, taken by eye with a tape measure at the top of the DS bump.

(Rats).

Thanks Nemesis - you're down Mendips way now aren't you? I'm just back on the bike after an interesting summer of having cancer and major surgery, so maybe I'll come down and join you for a nightride when I'm a bit more capable of riding without my heart, lungs and legs exploding!

Yep and glad to hear you're on the road to recovery...

I wouldn't worry about pace though I'm not exactly a rocket these days and I'll take any excuse for a break on the climbs 😉

Earlier in the thread I confirmed the purgatory on scraper rims (45mm) doesnt fit in std 29er pikes. Rubs on the bulges when turning due to flex. May work on slightly narrower rims.

Waiting for Rekon+

Balls, I suspect the revs will be worse.

Tyre shaving.......?

Well, I put the wheel in my 29er pikes, albeit not securely, as I had to remove the cap/spacer from the boost hubs, which probably made it sit a few mil higher than it would, but the 3in spesh purgatory did fit, just. Not a lot of room for a mudguard, or any mud build up.
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hmmm

let's face it - that's showroom clearance not trail riding clearance ... you think?

I guess tyre manufacturers are shooting ahead at upcoming B+ forks and ignoring the 29er aftermarket, which seems a bit of an oversight too me, it's 29er riders that are seeding this market.

Looking at these photos the concept seems to be a solution looking for a problem....whats the point of tyres so tightly squeezed into the forks that they'll foul up with mud on the first crappy ride?!

Didnt the last Mega winner do so by playing the conditions and putting 26 inch wheels in his 650b frame/forks for added mud clearance?

I reckon for it to work properly forks would need to have a radical redesign too...at that point things begin to get prohibitively expensive for most people....ditto the rear end of the bike, stays would need to become so wide to allow mud clearance that heel rub would be a common factor on plus sized bikes.

This is a part of MTBing that is just going to pass me by i'm afraid, i've never found myself lacking grip with a 2.5 Super Tacky Maxxis up front....and i've had the bonus of decent mud clearance to boot.
It's interesting to watch the early adopters and maybe this will sort itself out into some kind of affordable mass produced system whereby we all enjoy the supposed benefits of the additional grip on offer.

Still more clearance than the back of my T129 😆 !

I guess tyre manufacturers are shooting ahead at upcoming B+ forks and ignoring the 29er aftermarket,

I had a rabbit hole and knard combination on the front of my Gryphon but it felt quite heavy and slow to get up to speed. It's a much faster bike on some old Crests and a Hans Damph 2.35 at the front but I'm getting a blunt 35 built. That with a Chronicle has been fantastic on the Jones. Will probably stick with the Damph cause the Blunt makes it's footprint look not that far off the Chronicle anyway and it's slightly more speedy. Main thing for me anyway is mud clearance at this time of year. I wonder how some of the clearances shown cope with clag?

Deviant - I think you've mixed y up the point of this thread with the concept of b+ itself. A dedicated b+ frame and fork won't have clearance issues. This thread is about getting it to work in some combinations of 29er frames and forks that already have sufficient clearance.

As posted above, it's clear that the fatter b+ wheels don't suit many existing 29er suspension forks.

On the other hand several other combinations that still offer the benefits of plus size do work without clearance problems.

Thanks Thomas for taking the time to post that up. To be honest that's about the same clearance as the Trax fatty.

Anyone seen the purgatorys online anywhere?

Anyone seen the purgatorys online anywhere?

Lots more on Google- search for 'purgatory 27.5x3.0'

Add Evans to the list.

I think I'm going to get one and only use it with the rigid fork (which has plenty of clearance) rather than with my Reba.

What fork(s) are the b+ 3.0 tyres intended to work with?

Boost models I expect but not certain - as I said previously we're really looking at what existing ones they work on for this thread.

Yep - Boost front axles are 110mm and the forks are wider to give more clearance