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Post subject: Correct hybrid gearing
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street-fighter  Find me a Road! Joined: 02 Dec 2007 Total posts: 12 |
Hi there guys, can someone give some input on the correct gearing needed for my hybrid.Standard gearing with 18" rims is 39t&16t.I'm going to be running 17"'s and need a 17t on the front so that the chain clears the swing arm.What do I run on the back to keep the ratio?
Help appreciated.
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Posted: Tue Jul 22, 2008 3:19 pm
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| Rich |
I run 17/39 on both my Hybrid and Yamagamma. Both have 17 inch rear wheels.
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Posted: Tue Jul 22, 2008 3:30 pm
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gavin RD/RZ Jedi Master Joined: 03 Aug 2003 Total posts: 6333 Location: cheshunt, herts, uk |
depends on the tyre size, but a 150/70 -17 rear is pretty close to a 110/80-18 in overall size, so doesnt really affect gearing much.
i did this on excel a few years ago, just stick the numbers of the tyre in and the gear ratios and it will tell you max speed in each gear etc.
http://homepage.ntlworld.com/gavin.prior/gearing%20calculator.zip
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Posted: Tue Jul 22, 2008 3:34 pm
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street-fighterFind me a Road! Joined: 02 Dec 2007 Total posts: 12 |
| gavin wrote: |
depends on the tyre size, but a 150/70 -17 rear is pretty close to a 110/80-18 in overall size, so doesnt really affect gearing much.
i did this on excel a few years ago, just stick the numbers of the tyre in and the gear ratios and it will tell you max speed in each gear etc.
http://homepage.ntlworld.com/gavin.prior/gearing%20calculator.zip |
Thanx for the quick response dudes, the project should be finished in a little while.You gonna love his machine!
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Posted: Tue Jul 22, 2008 4:37 pm
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