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Tri Bike Gearing vs. Mountain Bike Gearing
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 2009-08-18 1:00 PM |
Regular  187   Barrie, Ontario, Canada |  Subject: Tri Bike Gearing vs. Mountain Bike GearingI currently ride a mountain bike and I am looking at purchasing a tri bike. I'm not sure how to consider the gearing differences with respect to hill climbing. As an example: If I need to be on the second chainring (32 teeth) and largest cog (34 teeth) on my mountain bike to climb a particular hill, will I be able to climb this same hill on a tri bike with a 39 chainring with a 27 cog? My mountain bike weighs about 35 lbs and has nobby tires. A tri bike would be considerably more aerodynamic, weigh less and have road tires. Would these advantages make up for the apparently higher lowest gear? I would love to hear from others who went from a mountain bike to a tri bike. |
| 2009-08-18 1:30 PM in reply to: #2355991 |
Resident Curmudgeon 25290 The Road Back Gold member | Subject: RE: Tri Bike Gearing vs. Mountain Bike Gearing Use this to figure out and compare the range of gear ratios on each set-up. Weight isn't much of a factor in most triathlons, aerodynamics and rolling resistance are, especially if you're riding knobbies. You'd see a big gain just if you switched to slicks for the road. |
| 2009-08-18 2:22 PM in reply to: #2355991 |
Extreme Veteran 547 Canyon Hills (Lake Elsinore), CA | Subject: RE: Tri Bike Gearing vs. Mountain Bike Gearing I went from a mountain bike to a tri bike. I skipped the road bike completly and using the same if not less effort, I manage 3 mph faster on training rides per my GPS. I ride an old tri bike with an 8 speed double with big rings and other then long steep hills it works fine and does great on the flats. Gearing on the tri bike is: Chain rings 44/55 and rear is 12-21. I am kicking around changing the gearing to do better on hills but most tri's are fairly flat. |
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