skid around all turns.

I like the way you guys respond to practical questions with a solution that'd make the situation even worse. True to the spirit of the forum :beer:

If you've got an old 27" conversion, I'd stick with 27" wheels. I'm afraid to put 700cs on mine. In fact I'm building up a new wheel set with new 27" inch rims...some are still making rims of that size, so there's no reason really to go with 700c. With 27X1 1/8 tires (or wider), the wheels are noticably taller than 700cX23. Plus, if you are tall and have a really tall frame, the taller wheels make the bike look better.

Of course it's going to make a big difference if you go from 27 x 1 1/8 to 700x23 - but if you stick with a similar sized tire, it's still only 4mm. My road conversion is a Nishiki built for 27" wheels, on which I'm running 700c x 28mm tires, and soon to go up to 32mm tires when these wear out. You gain a bit of clearance for fenders, and I've never had a pedal strike

BB height issues aside, personally, I kinda just like the idea of putting 27" rims on old frames...just seems more appropriate. Save your deep V 700C rims for your real track bike.

Any good geometricians out there..how many fewer degrees of lean will a 4mm lower BB translate into?

yeah... b4 i went fixed i used to corner mad tight, i used to have bmw shinburgers and they were huge and i still scraped them from time to time- i cried every time- now i have to be careful and ive had a few pedal scrapes but no striking yet- its scary- i have 170's a 700c rear and 27" front- i want narrower pedals and thatll help a bit but nothing helps cornering like a freewheel- sometimes i miss those days

Depends on how wide your pedals are and how much lean you get with the taller wheel/tire combo.