On a 17mm rim?

If anyone’s got some on a narrowish rim they don’t mind measuring for me, that would be very much appreciated!

Ta!

Hopeful morning bump…

Touch and go whether they’ll fit in the forks with enough clearance.

Alternatively, how little clearance is not enough? 4.5mm either side on the front? Just remembering a couple of aborted experiments with Knards and Niners.

Boom! mid-morning bump!

Hopefully someone will be along to put everyone out of my misery.

Cheers! 🙂

26″/650b/29er? Width?

Not really giving folk much to go on!

fair enough, njee! I’m interested in the 29ers, but they only come in 2.1, whichever wheel size you’re on, and I’d imagine they’d be fairly similar in width over the different wheel sizes.

I was thinking someone giving me the casing width of the 26ers on 717s is probably a better guide than someone giving me the casing width of the 29ers on Flows, say.

I’ll take what I’m given, though!

Just in case anyone searches for the same thing later and finds this…

I’ve found some people saying the 2.1 RaRa and the ThuBu (why not?) come up the same in width, and another person giving these:

Racing Ralph Sizes
2.1
Casing width 1.88″
Tread width 1.95″

2.25
Casing width 2.04″
Tread width 2.12″

2.4
Casing width 2.27″
Tread width 2.39″

Measured on a DT 4.2d rim at 40 psi after 24 hours

DT 4.2d is 17.8mm internal, 24 x 1.95 = 46.8, call it 46.0 on 17mm rim.

Call that “on the safe side” due to smaller knobs on the ThuBu, and there should be plenty of room in forks measuring 59mm across the important bit. I reckon.

* = not that safe, due to random internetz initial input, but eff it, I’ll give them a try.

Are you trying to fit this in a ‘cross fork or something?

Singular Peregrine forks, so yes, kind of. Want something light and quick but comfy for slightly too long an off-road ride. (hopefully dry)

a bike with a Thunder Burt on the front has just arrived downstairs

it’s on a Mach 1 Neo Disc allegedly, which has an internal rim diameter of 19 and external of 24.1

the tyre measures 52mm across from external knob edge to edge

It’s not a sandy Koga is it, Jo?

Thanks very much for the info, 50-52 might be a bit much. Might plump for Freds instead.

I’ve got a pair of 40mm clement xplor mso’s that I bought for the 100 mile gravel race thingy that got cancelled (still in packaging) if they tickle your fancy?

nedrapier – Member
It’s not a sandy Koga is it, Jo?

that it is 😉

Thanks, Rorschach I’ll check them out and let you know.

You had me worried with your talk of 100 mile gravel race thingies that got cancelled. Dorset appears to remain uncancelled!

Jo, what are you doing with it? Bought, borrowed? Racing/testing? Or just a “Gis a go, mister!” short term loan?

it’s a test bike for the road.cc

i’ll be swapping the tyres from what’s on now to CX tyres and ‘proper’ MTB 29er tyres to see how versatile a toy it might be

Interesting, I’ll look out for that. Even though I Definitely Don’t Need Another Bike.