1x11 for road? Ultimate WW wet dream?
Moderator: robbosmans
This is nuts if you ask me (I know, no one did). For MTB I get it, but there's not the huge difference in speed like there is with Road. Just don't see this working too well, but imagine how much weight you could drop. Pretty cool in that aspect.
http://www.bikeradar.com/us/gear/article/sram-brings-1x-tech-to-the-road-sram-r1-43808/
http://www.bikeradar.com/us/gear/article/sram-brings-1x-tech-to-the-road-sram-r1-43808/
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With a 50 up front and Sram's XX1 10-42 cassette you have a wider range (higher and lower) than a 50/34 with 11-28
http://www.gear-calculator.com/?GR=DERS ... 2&UF2=2125
The jumps between each gear wouldn't be very nice though.
http://www.gear-calculator.com/?GR=DERS ... 2&UF2=2125
The jumps between each gear wouldn't be very nice though.
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Yeah, but the weight you lose in the front derailleur and shifter, you potentially gain back if SRAM goes to a clutch-style derailleur. I really see it being useful for the triathlon or TT community, where they only need one ring in front.
As far as gear spacing, I don't see it being a big deal, if SRAM decides to go with 10-25 or 10-27 cassettes. Where I see an issue is if they offer wide-range cassettes only.
As far as gear spacing, I don't see it being a big deal, if SRAM decides to go with 10-25 or 10-27 cassettes. Where I see an issue is if they offer wide-range cassettes only.
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I set up one of my road bikes with 1x11, I am in Chicago and its really flat here. I am running a 50t up front and 11-25 in back with plans to maybe go to 11-28, but I don't really feel the need for it yet. I plan to use the bike in crits. It did save some weight but didn't put the CX1 RD on yet. So far having a narrow-wide ring up front seems to provide adequate retention, at least with the roads I've been riding here.
I think it could work in flatter areas as long as you fine tune the cassette to avoid gaps around the gear combos you use the most. Otherwise I would rather keep a fd and a nice, tight 11-21 or 11-23 cass.
Nice to see Sram trying new things. I'm a euro cycling nut, but Sram and their offering makes a lot of sense in the US esp. the crit scene in more urban and flat areas. I would like a wireless RD and single front ring setup on my crit bike! But go to the big hills in italy and I can't see it happening.
Nice to see Sram trying new things. I'm a euro cycling nut, but Sram and their offering makes a lot of sense in the US esp. the crit scene in more urban and flat areas. I would like a wireless RD and single front ring setup on my crit bike! But go to the big hills in italy and I can't see it happening.
Ultimate WW wet dream?
There are a few WW-tastic 1x bikes here, but their appeal does usually not originate in the omitted chainring.
Bikes: Raw Ti, 650b flatbar CX
Not sure if this will occur on the road systems...but on the mountain bike side...the extreme angle of the chain in the low gear wears out the chainring quite fast. The high mileage riders are noting that they are getting less than 500 miles ( 805 km ) on a chainring. How will it fare with road riders doing over 5000km's a year?
I run a 1x on my mountain bike. With the bike on the stand and in the 42T...I do notice more noise and friction coming from the chainring.
I run a 1x on my mountain bike. With the bike on the stand and in the 42T...I do notice more noise and friction coming from the chainring.
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Sram will hopefully offer more than a 10 /42t cassette. Currently there offering for mtb is not appealing as the lowest gear i use on my 29er is 1:1 if they did a 10 to 32T cassette then a 44T ring would be quite viable for all terrain. That i would go for and it would be light. A clutch deraileur is not needed on the road Just a narrow chainring.
The last point above is true But the chainline on a mtb is 50mm. It is shorter on a road bike Thus problem could be solved.
The last point above is true But the chainline on a mtb is 50mm. It is shorter on a road bike Thus problem could be solved.
bm0p700f wrote:The last point above is true But the chainline on a mtb is 50mm. It is shorter on a road bike Thus problem could be solved.
I don't understand what that means. The cassette is the same width in both cases, and the shorter chainstay makes the angle more extreme on the road bike not less.
formerly rruff...
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I could see this for flat crits, but I'm not sure it really makes sense for anything else.
I race cross 1x10 with an 11-32. For me, that cassette has perfect spacing... But only for cross. In training or on the road I'll gladly run 2 chain rings to fine tune cadence.
I race cross 1x10 with an 11-32. For me, that cassette has perfect spacing... But only for cross. In training or on the road I'll gladly run 2 chain rings to fine tune cadence.
WMW wrote:bm0p700f wrote:The last point above is true But the chainline on a mtb is 50mm. It is shorter on a road bike Thus problem could be solved.
I don't understand what that means. The cassette is the same width in both cases, and the shorter chainstay makes the angle more extreme on the road bike not less.
Agreed that any improvement in chainline on the low gear would be equaled by a worsening of chainline in the high gear. For some reason though, you rarely see people complaining about friction due to bad chainline in the high gear, even if there is a substantial cross angle. It may be that it is still within the acceptable angle range, but I have pondered if the smaller sprocket allows the chain to kind of self align more than a bigger one, as there is less wrap and bracing between the chain and teeth.
Jump between gears will be no worse than 2x8. That's hardly "unbearable".
Consider:
48 front
11-12-13-14-15-17-19-21-23-25-28
No problem there except for the missing 16 which is still only a 13% jump.
Low gear is similar to a 39/22.75, which is low enough for most road races I've done (Patterson Pass the main exception). For hill climbs I organize a hill climb series and this would be too low, however, for optimal speed, but then we seek out the nasty stuff, and the Brits are riding similar grades on freakin' fixies.
Compare:
53/39
12-13-14-15-16-18-21-23
And the weight advantage is great, but the more important advantage is you never need to worry about front shifts.
Consider:
48 front
11-12-13-14-15-17-19-21-23-25-28
No problem there except for the missing 16 which is still only a 13% jump.
Low gear is similar to a 39/22.75, which is low enough for most road races I've done (Patterson Pass the main exception). For hill climbs I organize a hill climb series and this would be too low, however, for optimal speed, but then we seek out the nasty stuff, and the Brits are riding similar grades on freakin' fixies.
Compare:
53/39
12-13-14-15-16-18-21-23
And the weight advantage is great, but the more important advantage is you never need to worry about front shifts.
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