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01-06.-2008, 06:51 PM
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#1 |
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Guest
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gearing mods
I've got a Tiagra groupee 52/39 12-23. Although I'm getting much
fitter, I'm not sure the lowest is low enough, for the 1 in 4 & 5 Derbyshire hills I seem to be frequenting. I have to get out of the saddle, and can't really do that for the length of some of the hills. Ideally I reckon going to a more compact set up would be best, but I'm guessing that's a new crank for the less than 39 tooth ring. I still want to maintain the 'out and out' road racer. I guess the other option is to maintain the same 8 speeds of the 9 speed cassette and swap the 23 out for a 25. But then I'm guessing we're in realms of esoteric cassettes or DIY pin removal? Any decent discussions on this? Links? Cheers, Mike W |
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01-06.-2008, 07:30 PM
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#2 |
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Guest
Posts: n/a
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Re: gearing mods
On Sun, 1 Jun 2008 02:51:54 -0700 (PDT), visionset <visionset@yahoo.com> wrote:
>I've got a Tiagra groupee 52/39 12-23. Although I'm getting much >fitter, I'm not sure the lowest is low enough, for the 1 in 4 & 5 >Derbyshire hills I seem to be frequenting. I have to get out of the >saddle, and can't really do that for the length of some of the hills. >Ideally I reckon going to a more compact set up would be best, but I'm >guessing that's a new crank for the less than 39 tooth ring. I still >want to maintain the 'out and out' road racer. I guess the other >option is to maintain the same 8 speeds of the 9 speed cassette and >swap the 23 out for a 25. But then I'm guessing we're in realms of >esoteric cassettes or DIY pin removal? Any decent discussions on >this? Links? On my hybrid I run 105/Ultegra 50/36 12-27 which is about the most I can squeeze out of the lower end without going to a triple and long throw rear. Neil |
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01-06.-2008, 08:19 PM
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#3 |
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Guest
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Re: gearing mods
On 1 Jun, 11:30, rothers <n...@rothers.demon.co.uk> wrote:
> On Sun, 1 Jun 2008 02:51:54 -0700 (PDT), visionset <vision...@yahoo.com> wrote: > >I've got a Tiagra groupee 52/39 12-23. Although I'm getting much > >fitter, I'm not sure the lowest is low enough, for the 1 in 4 & 5 > >Derbyshire hills I seem to be frequenting. I have to get out of the > >saddle, and can't really do that for the length of some of the hills. > >Ideally I reckon going to a more compact set up would be best, but I'm > >guessing that's a new crank for the less than 39 tooth ring. I still > >want to maintain the 'out and out' road racer. I guess the other > >option is to maintain the same 8 speeds of the 9 speed cassette and > >swap the 23 out for a 25. But then I'm guessing we're in realms of > >esoteric cassettes or DIY pin removal? Any decent discussions on > >this? Links? > > On my hybrid I run 105/Ultegra 50/36 12-27 which is about the most I can squeeze > out of the lower end without going to a triple and long throw rear. > > Neil You can get down to 36 on a standard 130mm PCD crank?, what chainrings are these? |
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01-06.-2008, 09:37 PM
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#4 |
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Guest
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Re: gearing mods
visionset wrote:
> I've got a Tiagra groupee 52/39 12-23. Although I'm getting much > fitter, I'm not sure the lowest is low enough, for the 1 in 4 & 5 > Derbyshire hills I seem to be frequenting. I have to get out of the > saddle, and can't really do that for the length of some of the hills. > Ideally I reckon going to a more compact set up would be best, but I'm > guessing that's a new crank for the less than 39 tooth ring. 38t is the minimum for 130mm. I think you would be happier with a compact chainset AND a cassette with a bigger big end. ~PB |
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01-06.-2008, 10:04 PM
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#5 |
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Guest
Posts: n/a
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Re: gearing mods
On Sun, 1 Jun 2008 04:19:10 -0700 (PDT), visionset <visionset@yahoo.com> wrote:
>On 1 Jun, 11:30, rothers <n...@rothers.demon.co.uk> wrote: >> On Sun, 1 Jun 2008 02:51:54 -0700 (PDT), visionset <vision...@yahoo.com> wrote: >> >I've got a Tiagra groupee 52/39 12-23. Although I'm getting much >> >fitter, I'm not sure the lowest is low enough, for the 1 in 4 & 5 >> >Derbyshire hills I seem to be frequenting. I have to get out of the >> >saddle, and can't really do that for the length of some of the hills. >> >Ideally I reckon going to a more compact set up would be best, but I'm >> >guessing that's a new crank for the less than 39 tooth ring. I still >> >want to maintain the 'out and out' road racer. I guess the other >> >option is to maintain the same 8 speeds of the 9 speed cassette and >> >swap the 23 out for a 25. But then I'm guessing we're in realms of >> >esoteric cassettes or DIY pin removal? Any decent discussions on >> >this? Links? >> >> On my hybrid I run 105/Ultegra 50/36 12-27 which is about the most I can squeeze >> out of the lower end without going to a triple and long throw rear. >> >> Neil > >You can get down to 36 on a standard 130mm PCD crank?, what chainrings >are these? Sorry, should have been clearer. I've got 105 derailleurs front and back, cassette is a Ultegra 12-27 but the chainset is a Truvative Touro 50/36 compact double with 110mm PCD. I can just about grind my way up Blaze Hill / Pym Chair with this without standing up  Neil |
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01-06.-2008, 11:03 PM
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#6 |
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Guest
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Re: gearing mods
Pete Biggs wrote:
>visionset wrote: >> I've got a Tiagra groupee 52/39 12-23. Although I'm getting much >> fitter, I'm not sure the lowest is low enough, for the 1 in 4 & 5 >> Derbyshire hills I seem to be frequenting. I have to get out of the >> saddle, and can't really do that for the length of some of the hills. >> Ideally I reckon going to a more compact set up would be best, but I'm >> guessing that's a new crank for the less than 39 tooth ring. > >38t is the minimum for 130mm. For some 130mm BCD cranks yes. I have a 7400 Dura Ace crank that had to be modified to take the chain over a 38 by filing chamfers on the inside of the arms to let the plates of the chain run low enough to fully engage the rollers on the teeth. >I think you would be happier with a compact chainset AND a cassette with a >bigger big end. Going for a 13-25 would be a good initial step. A quick look at Wiggle et al suggests plenty of choice in the 12/13-25/26 range. What these will tend to do is replace the second lowest with a 23 and then have a 25/26 as lowest rather than have a big jump to the lowest a la megarange touring setups. -- Phil Cook looking north over the park to the "Westminster Gasworks" |
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