| 40/42T cassette cogs; on a 1x10 setup | |
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| Tweet Topic Started: Jun 13 2014, 05:16 PM (287 Views) | |
| andyjh | Jun 13 2014, 05:16 PM Post #1 |
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Mud Lover
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Anyone tried one of these extra large 40 or 42T cassette rings? Thinking about trying a 1x10 setup but would like the safety net of a large rear gear to help me get up some of the larger hills. From what I've read so far it seems quite easy to convert but you need to drop one cog out of the cassette to make room for the new larger one, normally the 17T is suggested. This leaves a bit of a hole but oneup provide a new 16T with their 40 & 42T gears. You can also drop the 11T out and leave it as a 42-13T cassette whilst keeping the jumps smooth and you just need a larger lock ring. Only trouble with this I can see is the possibility of spinning out whilst running a 30T up front. Also there is lots of talk about the limits of the B screw when installing a 42T gear and pushing this to its limits and hence issues with shifting in the higher gears. 40T is meant to be better for this as it's less of a stretch but then you don't benefit from much of a lower gear ratio. The setup I'm thinking about would be a Race Face 30-32T narrow-wide front chainring paired to my current SRAM 1070 cassette with the oneup 42T and 16T additions. Any thoughts or experience with this type of setup? |
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| Ming the Merciless | Jun 14 2014, 01:43 PM Post #2 |
Overlord of all Known Sheds!
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Copied from the "Tech help please 1x10" thread From STW and other websites it seems there have been a few issues with the super wide range rear cog mods "defeating" the clutch rear mech and narrow wide chainring as they introduce too much chain length and lead to the chain falling/flapping off. I don't know if it affects 10 speed but speaking to an Enduro racer the SRAM 11spd equipment is VERY sensitive to chain wear and again leads to dropped chains. I've also heard anecdotal evidence from the LBS that the SRAM clutch mechs last about 12 months before going very loose and requiring replacement. Personally I'd stay conventional 2X10 with shimano clutch mech (I've run XTR and 2 XT clutch mechs all have been fine except I managed to crack one of the knuckles on the XTR one probably falling off at Cannock.....grrrr). 2 x 10 is not too much of a weight penalty and you have the benefit of getting up every hill and you won't run out of gears down hill either until you reach silly speeds. With that set up on the HT I've only dropped the chain once and that was whilst pursuing somebody on a full suss down a moguls type section. |
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| Coley | Jun 14 2014, 06:23 PM Post #3 |
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Fairly Muddied
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that person he was following was me 
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| Ashley1 | Jun 14 2014, 06:49 PM Post #4 |
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Moaning Muddy Margaret
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And I managed to get SRAM xx1 on a slash 9 to drop the chain where my remedy that runs shimano 2 x 10 has never dropped! |
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| andyjh | Jun 14 2014, 06:59 PM Post #5 |
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Mud Lover
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I had read the other thread but I was just seeing of people had first had experience with the aftermarket larger cassette gears. Clearly not a lot of love for this setup on here. I thought it was a good step towards single speed but not quite as committed! Well I thought I would try it anyway and have bought a Race Face 30T narrow wide front chain ring and a Hope 40 T-Rex cassette ring. Gives me some options and I can still go up at either end if I need more low or high end. Won't change it just yet as I have the Wiggle ride next weekend but will give it a go after that. |
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| andyjh | Jul 20 2014, 04:42 PM Post #6 |
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Mud Lover
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Just to report back on this setup now I've had a few weeks and lots of hills and singletrack to contend with. I went with a Raceface 30T narrow/wide and a OneUp 42T rear with one of their 16T cogs also to smooth out the big jump by removing the 17T. The B screw only needed a couple of turns to clear the new 42T and shifting is absolutely fine. I aimed to get the bottom end ratio similar to my existing 2x10 setup so I knew I should be able to handle the hills. I have lost a bit of top end but to be honest I would rather get up a hill then worry about coming down as fast as possible. All my local hills I've managed without dropping into the 42T and just sticking with the original 36T. This was good as I knew I had a bail out gear for when I hit some tough hills. Today we took a ride over to Stammer from Steyning and there was a few climbs involved in this route! Pleased to say that with dropping into the 42T on a couple of occasions, I managed to get up everything with no bother. Loving the simplicity of this setup, clean bars, bit less weight. So far very happy. Only remains to see if the SRAM compontry lasts. |
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| mudfish | Jan 5 2015, 08:03 PM Post #7 |
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Squeaky Clean
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Hia, I think you're right about the OneUp 42, it's great with the raceFace 30T chainring. OneUp also have their RAD cage which might seem like an unnecessary expense but it really does help shifting smoothness. Like you, I try avoid using the 42 to much as its an expensive item to wear out. enjoy it. neil |
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| andyjh | Jan 5 2015, 09:20 PM Post #8 |
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Mud Lover
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Hi Neil and welcome to MA My Fatbike now has a OneUp 42T expander with RAD cage and 30T RF n/w chainring so I think I've tested all the components on offer from OneUp  Bit more complex fitting the RAD cage as you need to dismantle the mech a little but just follow the online video and it's fairly easy to be honest.On the Fatty I do end up using the 42T a little more but pleased to report all is good and shifting in and out of this gear is perfect and no difference to the rest of the Shimano cassette. So two bikes and approx 800 miles on this setup it still one of my fav mods, default for all bikes in the future. |
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