Fatbike but with 29er (622mm) rims

cycleclinic

I like my 29er but the tyres are not wide enough. I ride rigid have done for years and i am not changing. Can't get wider tyres in my bikes so i need a new frame a bat bike.

Which frames though can take 29er fat bike rims with a 4 inch or wider tyres. In fact who makes tyres that big.
Got ideas in mh head. I dont have got get s custom frame do i oh wait that a great idea.
Could this be no 18. I need inspiration.

rockmonkeysc

I don't think you can get fat rims or tyres that big. It's a bit specialist.

Wheelspinner

This may suit...

https://opencycle.com/oneplus

cycleclinic

No thats a 27.5+ bike. Looks good but whats on my head is different.

oodboo

I'm what way are your tyres not wide enough?

cooldad

thecycleclinic wrote:

so i need a new bat bike.

Because he's Batman?

rockmonkeysc

oodboo wrote:

I'm what way are your tyres not wide enough?

They're too narrow.

cycleclinic

I simply want to have the biggest rolling diameter I can with wide tyres because I think it will be a hoot. It is an experiemnt but all my searches are drawing a blank. This might have to be custom in a very custom way.

oodboo

I think 29+ id's as big as you can go and that goes up to 3.25" on the tyres. http://www.charliethebikemonger.com/29- ... -236-c.asp

Why stop at 29" though if you want the biggest rolling diameter: http://www.pimcycles.co.uk/36er-faq/

.blitz

thecycleclinic wrote:

Which frames though can take 29er fat bike rims with a 4 inch or wider tyres.

Scott Big Jon 29x3

thecycleclinic wrote:

In fact who makes tyres that big.

Have not seen any that big. VeeTire have some 3.25 x 29

The Rookie

thecycleclinic wrote:

I simply want to have the biggest rolling diameter I can

36er then, a mate has one and it steamrollers almost everything, not exactly nimble though!

cycleclinic

I have thought about a 36er but what is in my head is not that.

now a 36" fat bike would be crazy enough.

That Vee rubber tyre is getting close. Maybe it will have to do. First time I have ever said Veerubber and that could e O.K in the same sentence. I normally see tyres from them that make me shudder.

rockmonkeysc

Just think of the weight of a 36" fat bike. It'll be 50lb easily. A 29er fatbike will be over 40lb.

cycleclinic

not necessarily. a sub 10kg 26er fat bike has been done. While I dont have that money the lack of suspension and the fact it will probably have a carbon frame and fork, means it will be about 12kg.

My steel framed 29er single speed is under 10kg and the frame alone is 2.5kg. Hense my optimism about weight.

I think the first thing to sort is the frame and fork. this is a project that will take some time I think.

rockmonkeysc

You won't get a carbon frame unless you're prepared to spend a LOT on a one off custom job.
You're only realistic solution is a custom built steel frame (at around £600+) but even then if no one makes rims and tyres you can't get them custom made. A mould for a tyre would cost ~£25k so no one will make you a prototype. Rims could be done as a prototype but at a very high cost.

N0bodyOfTheGoat

My Wazoo currently has a set of those Fatnotfat 29er wheels on it for what is left of the summer, but using 35c tyres for road use. Along with bars and stem upgrades, now down to ~10Kg.



In before garage needs a serious tidy

29er tyres in excess of ~2.35" are few and far beteeen, maybe the odd 3" model out there, but I don't know of 29x4.0 off the top of my head.

cycleclinic

Well I have started making enquires. This one will slowly evolve even if it takes a couple of years.

rockmonkeysc

How are you going to get tyres and rims?
I work for a tyre manufacturer and you'll be paying several thousand at leat for prototypes unless you can persuade someone to take them to mass production.

cycleclinic

I dont know how I will get it done yet. Only had the idea this week. This is the early stages of the idea. It will take time to develop as no one it seems has done one yet. I will not let however seemingly insurmountable hurdles put me off. Time is my friend here, with time solutions might present themselves.

rockmonkeysc

Not for tyres I'm afraid. To get them made you will need a mould. Even a soft (not hardened steel) mould is going to cost you around £8k if you can provide a properly built cad model, without that you cannot make a tyre. It's not something you can get made by hand for a few hundred pounds.
Your only chance is to try kickstarter to raise some investment but without a prototype it's going to be difficult and you won't get a patent or any protection.

oodboo

Maybe if he waits long enough one of the manufacturers will bring out the tyre he wants, I don't think he's looking to get his own prototype made. I think we all know that's not a realistic idea for an individual.

rockmonkeysc

Yeah, I think it's a bit too specialist for anyone to put in production.

The Rookie

I had a good look at a mates Trek Stache last night, full rigid and he's running 29x3.0 Bontrager Chupacubra on Stans 52mm rims, I really don't think you need any wider than that - they are HUGE!

johnmcl7

The largest fat bike wheels I've seen are 27.5x3.8 which I think only Trek support at the moment on their Farleys. There's occasional suggestions about 29 fat but never seen any sign anyone is working on it.

The 29+ wheels are not quite as wide as the fat bike wheels but they're still a good size (taller than 26x3.8's) and offer a good amount of speed with a surprising amount of grip. I have a Stache 7 and a Farley 6, as mentioned above the Stache wheels are a good size - I know 34in wheels exist and that fat bike wheels looked unfeasibly large to begin with but can't see a fat 29 tyre getting much support particularly when there's not been much progress with the 27.5 fat tyres.

John