- Disc Road bikes with Triples – Do they exist?
Shimano GS or SRAM mid (longer cage) rear mech with a 32T rear and a compact double?
Been going over this fairly recently, a lot of people are asking for lower gears on road bikes now. Interested in people’s thoughts on it.Posted 4 years ago
Triple road from Shimano (52-39-30) gives a 30×30 lowest as that’s the max range a GS mech can cope with, but a GS with a compact double 50-34 can cope with a 32 rear, so 34×32. We felt the number that the triple appealed to was small compared to the number put of by the less ‘road’like perceptions of it (I know that’s not so logical when you have discs) and the actual range is almost the same, just a few gear inches lost at the top end – no loss really for non racers. (edit to add, Sora can have a 32T with a triple, but not Tiagra or 105. Not sure why 10s mech capacity wasn’t made to be the same as the 9s.)
SRAM wifli can have a 32 rear, but again only with a double I think and they don’t have road-specific triples.
So triples tend to be MTB spec now and on touring biased bikes rather than lighter road bikes.ransosSubscriber
Triple road from Shimano (52-39-30) gives a 30×30 lowest as that’s the max range a GS mech can cope with, but a GS with a compact double 50-34 can cope with a 32 rear, so 34×32.
Whilst that’s true, it doesn’t solve the horribly large jump in ratios when changing on the front. I find with a 50/34 I need to shift two gears at the back at the same time. In contrast, my triple (53/42/30) has a much nicer progression, and a 42 middle with a 12-25T cassette is a perfect set of ratios for social rides.Posted 4 years agoantigeeMember
I’ve a 48 34 26 triple on my Kinesis Pro6 self build which I run with a 28 on the rear and 25mm tyres for sportive style rides (32 on rear for off road duties) – I know its time to drop to the granny when I see people getting off and lying down or starting to walk – of course its not a proper road bike though they only come with doubles and compacts are for old people who like to chat with me when we’re spinning a hill passing people desperately pushing big gears*
though to be slightly more helpful with the rear 32’s and 10speed I’d probably go for a compact unless carrying a full touring load
*yes the boys and girls that can really push big gears are already at the caféPosted 4 years agoDiscJockeyMember
I was just about to send links to a couple I know about, but noticed the 2013/14 models are now shipped with double compact chainsets instead of triples. You might find that’s the same with other makes now, so perhaps you might need to reconsider whether you definitely need a triple.Posted 4 years ago
I am hoping not as with the gear ratios etc talked about above it should be ok especially if a 32t can be put on the back. The bike that is currently the main contender is a Specialized Secteur Disc, looks pretty good, good price and comes with a a decent range cassette!Posted 4 years ago
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