http://citycyclingedinburgh.info/bbpress/ CityCyclingEdinburgh Forum » Topic: MTB Cassette on a Road bike en Wed, 13 May 2026 02:00:23 +0000 http://citycyclingedinburgh.info/bbpress/topic.php?id=11247#post-126574 Tue, 01 Oct 2013 10:05:07 +0000 Wilmington's Cow 126574@http://citycyclingedinburgh.info/bbpress/ <p>No idea on Shimano, but might be worth checking out cyclocross systems. I've got SRAM Apex (there must be a Shimano equivalent) which gives a long-ish mech that works with a larger cassette. I think I'm 52-36 on the front, but would have to check that - really wide spread of gears, because the smallest cog is 11T I think, and the biggest is mahoosive, which does mean there are some big gaps to bridge, but you get used to it.</p> <p>I was climbing in second and third lowest up the Bealach pretty comfortably (it was shifting to lowest that caused my problems) so I'd imagine would suit a stronger rider such as yourself. </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=11247#post-126568 Tue, 01 Oct 2013 09:53:33 +0000 DaveC 126568@http://citycyclingedinburgh.info/bbpress/ <p>Hmm, looking at the Dolan website, the rear derailleur may be the Shimano 105 CS-5700. I'll look up the specs. </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=11247#post-126543 Tue, 01 Oct 2013 06:28:33 +0000 Dave 126543@http://citycyclingedinburgh.info/bbpress/ <p>Xtr is like dura ace. Deore like 105?</p> <p>SWMBO's running a 50-34 w.ith 11-32 IIRC, I just fitted a std Mtb mech to existing Tiagra brifters </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=11247#post-126539 Mon, 30 Sep 2013 23:27:06 +0000 DaveC 126539@http://citycyclingedinburgh.info/bbpress/ <p>Cheers. I have a long cage rear so I guess 34 should be reasonable. I don't see me using 34 up front with 12 on the rear. I'll look at the link tomorrow, when I'm in front of a PC. Cheers. </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=11247#post-126536 Mon, 30 Sep 2013 23:04:16 +0000 kaputnik 126536@http://citycyclingedinburgh.info/bbpress/ <p>Here's how to calculate what sort of Shimano rear mech you'll need;</p> <p><a href="http://forums.mtbr.com/drivetrain-shifters-derailleurs-cranks/when-use-long-cage-vs-short-cage-derailleur-205890.html#post2019042" rel="nofollow">http://forums.mtbr.com/drivetrain-shifters-derailleurs-cranks/when-use-long-cage-vs-short-cage-derailleur-205890.html#post2019042</a></p> <p>There's no point me paraphrasing.</p> <p>I agree with the "Shimano area a bit conservative" thing, I've squeezed in a slightly larger rear cassette than is theoretically recommended in the past. Not a full on MTB cassette, but getting there.</p> <p>The cheaper option is to accept that the other guy is faster and trust that he'll wait for you at the top :) </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=11247#post-126533 Mon, 30 Sep 2013 22:40:37 +0000 Baldcyclist 126533@http://citycyclingedinburgh.info/bbpress/ <p>Not just the size of the block, you need to take account of the front big ring. I have a 12-28 (maybe 30, can't remember) on the back, and a 50/34 compact on the front and the chain is so loose that it is bouncing off of the chain stay on the 34 30/28 combination, not that you would use that in real life, but you may also need a long cage rear mech. </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=11247#post-126529 Mon, 30 Sep 2013 22:13:25 +0000 DaveC 126529@http://citycyclingedinburgh.info/bbpress/ <p>I ran out of geers chasing Dave up the Lecht on this years Snow Roads. As I have a few more steep hills planned, I thought I'd get an MTB cassette to replace the 108, 11 - 28 I have on at the mo.</p> <p>Chain Reaction have a good deal on some at the moment. Does anyone know how the HG naming system compares? I see there is a HG50, HG62 HG81, XT M771...</p> <p>How do these compare against the road range? HG50 = Sora therefore HG81 = 105 and XT M771 = Ultegra?? for instance? </p>