I have a 700cc wheel. No problem. How is it that it won't fit in the forks that I was given today? Can you get very low profile tyres?

Some track forks have very small clearances (which look great) but they limit your tyre choice to wee ones.

Yes, what tyres are you using? Most forks nowadays run short drop brake callipers and 23mm tyres.

Otherwise, its not a 27" or 650b fork or something daft?

a 27" fork would be larger than a 700c, but the 650 suggestion could be true, although a 650 wheel is significantly smaller than a 700.

It's a specialised sirrus road frame – looks like about 10 years old or more. The back swallows a 700 wheel, and it's only when I put the front brake on that it rubs.

The frame was given to me by Andy at 2Wheels in Stourbridge as my normal fixie broke…

I am currently trying to turn a Townsend Mango Creek into a commuter, but am losing the will to live.

(

one's deep drop 57mm brake fitting, the other std 39mm?

mmmm….what's that mean james? I use a front brake – a cheap shimano sora

Brake clearance varies.

Change the caliper.

Cheers. Any idea what a really low profile caliper is then? I have an old campag one which is too big, and this sora.

sirrus bikes usually use v-brakes, not calipers.

If you fit a caliper brake to the hole in the fork crown, meant for the mudguard bolt/reflector bolt, then it will not go any where near the rim

this is the brake. Forgive me, I don't know about brakes…is this a v brake?

I know these are stupid questions.

if yours is an old sirrus it wont be running v-brakes (dave, old models arnt always the same as current ones), is the wheel rubbing on the brake or the fork? also, what tyre you running, could make a difference.

Where is it rubbing?

The top of the tyre (conti gator skin) is rubbing on the lowermost point of the sora brake (just to the left of the 's' on the picture above)

Cheers for all the help.

Narrower tyre needed I am afraid. Though it may clear when it's set up as the arm pulls up a bit.

Cheers Al, I'll slip into something less comfortable!

cynic-al is right, when you setup the brake you often gain a little clearance but if its that tight a narrower tyre might be your only option.