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Re: [ST] 17/45 gearing.



I know this has been discussed a lot before, but I would like to hear it
again myself.  I have already gone to the 18T Triumph front sproket, but
would still like a little more seat of the pance acceleration feel and would
like to know the next best step.  I am not in need of top speed on the bike
either, especially when running with a passenger, side panniers, and tank
bag.  But it would be nice for better acceleration when loaded like that.  I
usually run around an indicated 80mph which is about 4700rpm or so.

So let's hear the opinions, especially on the need to change the chain if I
go to a larger tooth count rear sprocket.

Eric Mann
RAT Member #117196
eric91z@xxxxxxxxx
'01 Triumph Sprint ST
'95 Ford F-150 4x4
- ----- Original Message ----- 
From: "John Hickman" <jhickman@xxxxxxxxxxxxxx>
To: <ST@xxxxxxxxxxxxxx>
Sent: Monday, May 19, 2003 9:55 AM
Subject: [ST] 17/45 gearing.


> I have heard several accounts of people changing to a 17/43 gearing on
> Sprints, but has anyone changed to a 17/45 gearing?  Can you retain the
> stock chain length?
>
> This changes the final drive ratio from 2.39 to 2.65.  Based on some rough
> math (which I think was originally from a spreadsheet by Keith 'BRG'
> Tynan), this would change a 75mph cruising speed from 4700 rpm (on a
1999's
> 18/43 ratio) to around 5100rpm.  Since I don't do a lot of high speed
> riding, I don't mind the loss of top speed potential.
>
> Any thoughts?
>
>
> John Hickman
> 1999 ST
> Lexington, KY
>
>
>
>
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