The Improbable Bulk
Join Date: Jul 2005
Location: Wilkes-Barre, PA
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Which did your bike originally come with?
If it came with 27", I would stay with it strictly so that you would be sure of brake reach.
Admittedly brake reach only needs an extra 4mm to reach the 700c, but every extra mm of reach means your brakes are a little less effective due to leverage. If you want to move to 700c, be sure your brakes do have the additional 4mm of reach available.
People get all excited about the extra availability of 700c tires, but frankly, if there is one tire you like in 27", does it matter that there are only 30 different tires for 27" and 3,000 different tires for 700c? I suggest that it does not.
The tires for 27" are wider than the narrowest tires for 700c, but I think the narrowest tires on 700c are too narrow for most riders anyway. Not all of us should be on 23mm tires. People would enjoy riding a lot more if they would change to more comfortable widths instead of riding what Lance rides.
I ride 27" on most of my bikes because I ride older bikes, and that is what they came with. The wheel quality is fine, and in one case, I recently had a set built in 27" because of brake reach (cantilever brakes on a touring bike).
If brake reach is fine for either, then 700c should be fine. However, if it is a stretch, don't drink the kool-aid... stick with 27"
Slow Ride Cyclists of NEPA
People do not seem to realize that their opinion of the world is also a confession of character.
- Ralph Waldo Emerson