David. Thanks for the reply. I am also questioning the original purpose of the frame! I took it on understanding that its a Paul Milnes 531 steel cx frame. It has all top tube routed cables and a top pull front mech, routed down the seat tube. So on face value looks like a cx frame. Last night I fitted the rear wheel with 35mm tyres and there wasnt enough clearance, I reckon a 28/32mm tyre would be the maximum. Maybe it isnt a cx frame after all. TBH what I thought would be a cheap build for a winter commuter is proving a bit of hassle. As the front mech is top pull it seems impossible to find a double top pull mech that will work with stis. Maybe a 1x8 might be the way forward. Charlie
If it has top tube gear cable runs it sounds as though it should be a proper 'cross frame. To get a double front mech to work you need a small pulley on the seat tube in between the BB shell and the mech to make a bottom-pull derailleur work with top-pull cable routing (e.g. the old ALAN 'cross frames had these fitted at the factory). DMR make a widget called a Mechverter which clamps on to the seat tube and does just that job:
http://www.sjscycles.co.uk/images/produ ... G10815.jpg
For a frame of that age, you'll probably struggle to get anything fatter than a 30mm or 32mm tyre to fit; cyclo-cross tubs of old from makers like Clement and Barum were usually 28mm tops. If you're building a commuter, a good quality 25mm or 28mm touring tyre is worth going for.
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