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I've decided to go single ring on my CX bike, it's Shimano 105 5700 drive train with a 36/46 up front and 11-28 out back.
I've gone for a 38t narrow wide superstar ring off the classifieds on here; so if I want to keep the same bottom end (the important bit to me) will a 30t cassette suffice or should I plump for a 32 one?
Is there any need for a front chain guide as I won't have a clutch mech with it being shimano road.
38/30 or 32 both give a lower gear than 36/28
Is there any need for a front chain guide as I won't have a clutch mech with it being shimano road
Probably
I'm running a 38 tooth Hope narrow wide on mine with no chain guide and a vanilla 105 rear mech. No trouble so far and it was very muddy at Penshurst today!
36:28=34.7" gear
38:30=34.2" gear
I'm also running narrow wide (SRAM Force) and the chain hasn't budged from the front chain ring yet after four races so far. I have managed to rip apart my rear mech (105) and gear hanger already though. 😳
Similar radio's when I started and went single ring last year.
Using 105 5700 as well and used a Narrow/wide 38 front ring with a 12-30 Ultegra cassette.
Just started using a XT 11-32 cassette and I think this gives a better spread of gears.
When using a Shimano rear mechanism with a narrow wide ring there is a mod to tension the spring on the cage.
It is on the Park website and was on the Absolute Black website.
Thanks,
Max
Steve, I'm running my 1x9 mtb with an on one single speed front ring (so not narrow wide but with deep unramped teeth) and with the rear mech spring mod I haven't dropped a chain... That's a rigid mtb in the peaks so buuuumppppyyy!
I'm going to run the same mech mod on my cx with the 40t nw I got to in place of the 38 with no front guide.
I'm running 42 ring, 11-32 cassette (sram force 11 speed)... and I only recently struggled on a crazy-steep CX course, 99% of the time it's perfect.
I think I'll leave the 42 on there and get the 11-36 cassette. A 38 wouldn't be enough high gearing on the flatter courses for me.
I think I'll leave the 42 on there and get the 11-36 cassette. A 38 wouldn't be enough high gearing on the flatter courses for me.
😯
I'm 1x11 with a 38T NW front and the standard rear (11/28 IIRC), just done a pan-flat course today, Strava/Garmin shows my top speed as 25mph and I don't think I even troubled the bottom few cogs!
I've got SRAM Rival 1 on the Raleigh RX Race 2016 I'm reviewing at the moment. Not especially impressed. Lost the chain about 4 times in half an hour this weekend, the mud just got so thick it was pushing the chain off the teeth. So either a chainguide or regular bike changes is needed methinks.
Guess I'll go for the 12-30 then