Originally Posted by
SkyDog75
If you're going to replace the wheels, you might as well go 700c. There's nothing inherently wrong with 27" rims, but you'll have more 700c options to choose from. And a significant number of 27" rims will be mated to freewheel hubs which aren't typically as durable as the freehubs you'll find on most 700c wheels.
The things you'd need to take into consideration is needing to spread the stays to accommodate a 130 mm hub and ensuring your brakes can reach 4 mm longer than they currently do.
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If your bike is 126mm rear axle spacing, you can easily spread it to 130mm without cold-setting it, giving you 8-, 9- and 10-sp options.
The tire choices for 700c make it worth it. The tire choices for 27" make it not worth replacing a 27" wheelset