Coker Radius, tire width and brake question

I’m going to build up a 36er with the new KH/Schlumpf hub and the triton frame. Dmitry needs the coker radius…does anyone know offhand the radius? Would it be many different with the new Nightrider tire (at 65 psi) and rim?
The tire width is still 2.3, correct?
Finally, the issue of brake bosses. In general, I am anti-brake. I’ve never felt a need for a brake running 125s on my Coker as fast as I can. I am also thinking the same about the guni, but is that foolish? Are there any other anti-brake people that moved to GUNi and changed their perspective?
Thanks for your input.

i believe the wheel radius is approx 18 1/4 inches, of course it varies depending on tyre wear and which batch of tyrs you’ve got.

The tire may say 2.3" but it does not mean much to me. I have seen 2.3 tires that had different physical size :slight_smile:

What I want is the center of the axle to TOP of the tire measurement.
And the actual tyre width in its widest.
In mm :slight_smile:
I want the frame fit the actual tire, not some virtual one.

Watching with interest

I’m going to order one when I get back home from Uninam.

Are you using ISIS hubs? Magura or regular brake mounts?

The best way is to build your wheel first, then take measurements yourself as directed by the frame maker. Even better, give the frame maker the wheel to measure himself. Good luck!

I will measure my wheel when I get home. It has a TA tire on a Airfoil rim.

I haven’t actually received the wheel set yet. I snagged the last KH/Schumpf UDC had in stock, but they are out of 14 gauge spokes, so the wheel build will take a while…
Again, the goal is the KH Guni, (ISIS geared hub) with the new Nimbus rim and tire. (and then to somehow salvage my marriage when she finds out how much I am spending) :astonished:
Anyone have the new Nimbus tire/rim that they could measure the actual width?
Thanks

Do you have to get spokes from udc?

uh, sorry, left my wheel at a friends house and got a ride home. St. Pattys day and all.

Yes. I have brakes on my Schlumpf, without it it is not so good on the downhills in high gear, as it’s too easy to get out of control.

Joe

I would love to run a brake on my new 29" guni, but I just have to figure out how to mount the handle comfortably with my set up. I can’t use a bar end b/c of the 27.2mm post and I cant put it on the rail adapter b/c it is not in reach and I cant use a brake extension because of the GB4 bars getting in the way haha.

I would recommend at least getting the magura mounts on the frame and you can decide later if you want to run brakes. The wheel is going to be heavier than your old 36er so when you are going down hills/mountain roads a brake will really help out your knees!

Sounds like you will have a sweet geared 36! I was thinking of going that exact same route actually, but the geared 29er will be fiting my travel needs a lot better. Sometime next year I may swap it out and put it in a 36er.

Make sure you use the correct measurements for the bearing holders. Might be a good idea to email Florian or Kris, but they should be 42mm and have a 2mm lip on the inside edge of the bearing housing.