ClarkinHawaii

YES IT'S BEEN CONFIRMED IN ANOTHER FORUM SO PLEASE DISREGARD THIS POST. THANKS



Has anybody verified that the new 10-speed mtb cassettes from Shimano work properly with the 10-speed 105 crankset and shifters?

I am currently running the IRD 10-speed 11-34, which works fine (with mtb long cage rear mech). Don't want to order the Shim 10-speed 11-34 until I know for sure there's not some subtle problem . . .

I believe in their advertising Shimano made some statement to the effect that the new 10-speed mtb stuff would "not be compatible with 10-speed road components" or something.

Thanks

Chris_W

New 10-speed MTB REAR DERAILLEURS (marked as Dyna-Sys) are not compatible with road shifters because the cable pull has changed. The new 10-speed MTB cassettes are completely compatible, just use a non-Dyna-Sys rear derailleur to shift the chain. Also, Shimano recommends using the matching chain with the new 10-speed MTB cassettes, but this is probably only necessary if you want super-smooth shifts, I expect it will work with any 10-speed Shimano/SRAM chain.

Unfortunately, the non-Dyna-Sys MTB rear derailleurs might not be able to handle the 36-tooth cog that is on some of the new cassettes, but since you were asking about one with only a 34-tooth cog then you should be OK.

Shimagnolo

Just an FYI:
I have a Dyna-Sys XT RD here, (not mounted), and just playing around with it and roughly measuring the cable travel in comparison to an RD-M592 (which we know works with the 10s mtn cassette & road shifters), I would say the Dyna-Sys cable travel is easily *double* the travel of the RD-M592.

ClarkinHawaii

Interesting--Thanks, Guys!

ClarkinHawaii

Interestingly this new SLX 10-speed cassette HG81 does not come with the 1mm spacer for the freehub body. So I robbed another wheel and installed the cassette with a 1mm spacer. The lockring would only go on a couple of rotations--something wrong.

I was under the impression that all shimano 10-speed cassettes require the 1mm spacer, but this is clearly an exception. So beware--it would be very easy to strip the lockring threads if you install this jewel with a 1mm spacer.

Al1943

Does this mean that the big cog on the new mountain cassettes is 1 mm closer to the spokes? Seems that would be the case.

ClarkinHawaii

Actually the big cog is lined up just as it was with a 10-speed 105 cassette (with 1mm spacer). I know this because I put the wheel on a bike with indexing adjusted and it works perfectly. So the difference would appear to be 1mm more metal on the inside end of the sleeve on the spider that slides onto the freehub body. In other words, the spacer is just built on. Like they could have done a long time ago. Makes you wonder.

Also--the rivets holding the biggest cogs to the spider protrude toward the spokes enough that I had to remove my dork disk as it was binding. Actually, it seems as though the whole deal would be better with the 1mm spacer in place--except that the lock ring would not screw on properly. I doublechecked Shimanos tech docs and sure enough no spacer.