Originally Posted by Bigmark
I have a GF Tiburon, with a stock gear set Crank 48/38/28, and a cassette with the 13-34 7 speed. Now that I have road my son’s road bike I was thinking that this may not be the best gear combination for me. I like the seating position of the Tiburon, but I like the gears of the Trek
I usually start out in the 2nd sprocket, and go up from there. I never use the #1 sprocket, nor do I use the 34gear on the cassette. This is making me wonder if I would be able to upgrade to a 30/42/52 crank, and a 13-24 7 speed cassette.
What would be the problems I would get into, and what benefits would I gain by doing this?
Why not just try the cassette swap first? I'm not sure what a GF Tiburon is by the way. I thought a Tiburon was a Korean (fake) sportscar. Anyway, if you have the 13-24 7 speed cassette, go ahead and put that on and try it out. You may have your problem solved right there if you're satisfied with a 48X13 top gear which I think is the main limitation for road use. Do you attack downhills? Which brand 7 speed cassette do you need? You may be able to get one with a 12 tooth small sprocket, the 48X12 is just a little better. The gear inches are a little steeper if you have 700c: a 48x13 = 99.7, or a 48x12=108.0 gear inches. If you are talking 26" wheels the gear inches would be slightly lower.