Polo GI...

That's what Adrienne is on right now. You coming up to Downham this aft, Matt?

unfortunatley i have cottered cranks so im stuck with 46 teeth up front

therefore 22t isn't ideal as it only 11 skid patches
23t is 1 skid patch
24t is 12 skid patches (not bad)
but by far the best is 25t with 25 skid patches and 48.5GI

so thats why i'm hunting down a 25t

You'd be better off replacing the cranks. I've not ever seen a 25t sprocket. Although I'd never seen a 24t either until I found mine at a jumble.

That's what Adrienne is on right now. You coming up to Downham this aft, Matt?

nopes. got work to do. :( was working yesterday too after a quick pit stop to cavendish and ten ten tei.

Mmmmm ten ten tei. although kulu kulu wins out most times.

;508900']You'd be better off replacing the cranks. I've not ever seen a 25t sprocket. Although I'd never seen a 24t either until I found mine at a jumble.

old post!

i finally replaced my cranks + bb,
and am now running 40/22

Doh!

39T/25T fuck yeah.... 50 skid patches...... and fuck all G.I

You're going to be even more shit now.

34/22 with 152mm cranks

niceee

did you won the cranks in Ebay last week?

These are sugino cranks from a recumbent. 110bcd

has anybody thought of modifying some triple road/mtb cranks, and using the inner most ring? 22 is common on most mtb cranks.
Machine/hack away at the rest of the crank, use a slightly longer bottom bracket for the chain line and you will have options of even smaller gears.

though i think anything under 40" is a bit of an over kill perhaps. Though you could run 22/15 for extra b/b shot clearance

That's what I've done with Adrienne's polo bike - except using the middle ring (36) rather than the inner (26). Except there was no hacking needed. Old Sugino cranks with a bolt holding all three rings together.

I'm actually thinking something similar, except I'm going to keep two chain rings on and use the smaller one with a big cog for polo and the big one with small cog for riding... aleviating the limits of the chain/dropout length...

Eg 42x15 and 36x21...

I'm actually thinking something similar, except I'm going to keep two chain rings on and use the smaller one with a big cog for polo and the big one with small cog for riding... aleviating the limits of the chain/dropout length...

Eg 42x15 and 36x21...

36 21 is tiny

Isn't that the aim?

Hmmm, has anyone ever run ratio below 1?

48/20--->65 G.I.
and we wonder why i am always a step behind?

36 21 is tiny

I have finally sorted it all out and now have:
36 x 26...
(not quite as spinny as you'd think as I have 27inch wheels and 170mm cranks, still according to sheldon 36.4 gear inches)
13 skid patches... if I was actually able to skid... (I can always put it up to 39 and have 26 patches, 52 if ambi skiding...)
From playing at wests (where it was 2v2 and a massive pitch) I'd say it's not too spinny at all.
and with the double chain ring and fixed/fixed hub I currently cycle home on a 42x19, but I'm going to try to squeeze a 16 in it's place... failing that a 17 will certainly fit.

Oh and the larger chain ring acts as a bash gaurd! :-)

...

Oh and the larger chain ring acts as a bash gaurd! :-)

And as a sawblade! ;)

Khornight2, where'd you score a 26t cog?
Fixed gearing, 41x24 (45.1 GI).
Free gearing is 41x26 (41.6 GI). A fine old piece of T.D.C. craftsmanship...

I think JD on this forum may have a 26t left.

How's that freewheel working out Mike?

42x28 - 40.1GI FTW!!!
2 skid patches :D

Yep of JD in the classified threads... think the title is about 22t, last post I saw said he had one left.
Here :
http://www.londonfgss.com/thread18038.html

Eddie where did you get 28 from?! I want it, even though the more I think about it, I don't really need it!

Yep of JD in the classified threads... think the title is about 22t, last post I saw said he had one left.
Here :
http://www.londonfgss.com/thread18038.html

Eddie where did you get 28 from?! I want it, even though the more I think about it, I don't really need it!

hah its a welded in cassette wheel.
everything but the largest cog you screw off and weld in the biggest fucker to the hub.
I should've done up the one with a 32 :)

I think JD on this forum may have a 26t left.

How's that freewheel working out Mike?

You mean how's my hip? I've worked out what went wrong that sent me over the bars... squeezing the brake while still pedaling! It works in a similiar way of trying to stop pedaling a fixed wheel.

I'm almost happy with my 41x24, the 26 freewheel was a bit too spinny for anything bigger than downham. I would go to 39x24 though...

;626561']squeezing the brake while still pedaling! It works in a similiar way of trying to stop pedaling a fixed wheel.

Ha!

I had a similar moment in goal when I was trying to reposition my feet whilst hopping not realizing I was holding the brake.
Freaked me out big time!