IRO Mark V

Steel frame takes a 27.2 post, does anyone know what size clamp it takes?

I would guess 27.2 + 2 x the wall thickness of your seat tube.

The reason I don't say simply measure the diameter of your seat tube is that it may be a little smaller when tightened down round the post and considering a seatpost clamp will need to be within 0.2mm of the correct size to work this tiny variable is important, jesus this is a long sentence, possibly the longest I have knocked out today and it is still going, in fact it seems to be picking up speed, I think I should introduce some new ideas to keep your interest, do you think anomalous monism or epiphenomenalism have a place in the sciences, I am not so sure.

That's it, it over.

31.8mm is the size you want.

Do you have another problem in that area or were you just being overenthusiastic with the allen key?

Seat clamp shouldn't take too much tightening if everything else is in order.

Tynan, just sold his clamps that would fit to dale :(

Tynan, just sold his clamps that would fit to dale :(

Common as crabs, try Evans.

CHUG-IT, just bought a very nice hope one of fleabay, seller has loads 9.95, free post

http://cgi.ebay.co.uk/Hope-Allen-Key-Seatpost-Clamp-31-8-Black-New_W0QQitemZ250235812131QQcmdZViewItem?_trksid=p3286.m20.l1116

Not very nice at all.

The bolt isn't articulated, so overtightening buggers the bolt and the collar.

only if you keep un-doing/tightening it :)
but your right i suppose

I'm just too keen when it comes to tightening it down. I do it all the time, i'm an idiot.

Thanks for the advice but the 31.8mm the shop gave me was still too large even when bottomed out and both parts of the clamp were touching. Must be more like a 29.2mm.

if it's a steel frame then it's a 28.6mm

CHUG-IT, just bought a very nice hope one of fleabay, seller has loads 9.95, free post

http://cgi.ebay.co.uk/Hope-Allen-Key-Seatpost-Clamp-31-8-Black-New_W0QQitemZ250235812131QQcmdZViewItem?_trksid=p3286.m20.l1116

£10!?

if it's a steel frame then it's a 28.6mm

Only if the steel is 0.7mm thick at the seat tube cluster, I guess steel tubing varies a little.

On One/Planet X do what appears to be an odd size at 29.8mm. If the 28.6 is too small and the 31.8 is too big maybe it's one of these.

Peace

Kurt

just found this

http://www.bikeforums.net/archive/index.php/t-332724.html

seems some iro's have a 30mm clamp size.

Seems to be an inexact science.

I put a Powerplay 31.8 on Mrs K's wheels of steel and it wouldn't tighten down enough, but a 28.6 M_Part wouldn't fit over the tube at all.

My CONdor is steel and takes 31.8mm

It's only a seat clamp !!

but it is very important

So i just went to the shop and they have none in the required size. I'm in a fucking foul mood.

I've got an unused 28.6mm M_Part (see above) if you reckon it will fit.

In Archway.

Have you tried Cavendish, they're bound to have one that'll fit an IRO seein' as they sell 'em an' all that? If not, Brixton Cycles are open 'til 7 tonight, pop down with your bike and they'll sort you out... I got a replacement for my IRO at London Fields Cycles, special PitLock one tho' so may not suit...

29.8 clamp. and i've got one waiting for ya if you want it

I had this problem with my on-one Pompino. I made a shim from a beer can, seems to work!

NJS jubillee clips and a bit of HTFU

NJS jubillee clips and a bit of HTFU

Class.

it's what holds my il (sick) pompino together, I have a large box of these jubillees..

I'm even considering using them to hold bottle cages to the roberts (the track bike, not my old fellah)

Thanks guys I got one sorted out last night from my local in clapham. Would have gone to cavendish but would never have made it there and back in my lunch break!

Cheers anyways.