Cycling UK Forum

I guess it just shows how far things have come that the upper jockey wheel can now be an inch away and it still shifts acceptably. With the old design it sort of is going go up in a curve, more in line with the shape of the cassette (11-32t). I keep forgetting which way it's tensioned. If, on the sm...

I haven't noticed this while riding, but on a brand new chain and cassette, if I have my bike upside down and whizz the back wheel around fast, then turn the crank slower so it's not engaging and turning the wheel, there's a knocking sound. If I turn the crank so it turns the wheel, the knocking sou...

A while back on 10s people were running those cassettes with 50t sprockets. I don't know what the shifting must be like on those with a shadow rear mech but I know the upper jockey wheel cannot be anywhere near the smaller sprockets. Maybe having a chain that's deliberately too long could help with ...

I have had one a while ago that when tightened on, wouldn't rotate properly. This would never be an issue on the shadow versions.

I have the M772 and it does shift well, but I wonder why they do when the chain is further away from the smaller sprockets and the mech can't rotate anymore. The best shifting I have ever seen was from a 6500 (GS). It even beat the more expensive 7700 GS which for some reason never did quite work ri...

On older rear mechs like this RD-M750, you could still push the rear mech closer to the sprockets by hand, it was sprung at the main fixing bolt so it could rotate... https://i.imgur.com/Hclqz0V.jpg On the newer shadow rear mechs like this RD-M772, the mech is fixed wherever you set it to and it can...

I'm ending up going to increments of 0.5mm here. 2mm spacers worked with a 9s chain (it never slipped between the middle and inner in real-world usage) but on a 11s chain it can slip between them. This is only between middle and inner, a 9s or a 11s chain cannot fit between the middle and outer, so ...

My Stronglight Z Light triple on Moulton was problematical from Day One in this regard. The spacers between middle an outer were too wide and the chain often didn't go onto the middle ring and spun in between. I took the spacers out and fitted them on a mandril and spun them with my drill against t...

I measured the 4 washers (a huh huh huh sorry "chainring bolt spacers"!) and they are all different thicknesses: 1.9mm, 1.9mm, 1.8mm, 1.6mm. :roll: Measuring myself, a 9-speed chain is 6.5mm whereas an 11-speed chain is 5.6mm. That's a difference of 0.9mm then /2 = 0.45mm so that's probabl...

On a 9-speed MTB triple chainset (or really any triple to work with Shimano front shifters and derailleurs) is the gap between middle and outer meant to be the same as between inner and middle? My (11-speed) chain is able to get jammed between the inner and middle rings (9-speed chainset) but it can...

Yeah but I get exponentially weaker as hills gets steeper. If I am on the 21t sprocket (or bigger) then I am on a hill and if I am on a hill, I want every sprocket after that to have a decent jump to it. The ones around the middle to me are the 14/15/16/17/18/19. The worst cassette for gaps I have e...

These things have become throwaway items (like the Deore Hollowtech BB) but back in the day the same square taper BB lasted for 3 or 4 bike frames.

I had a think about going back to 8-speed, I remember shifting being the fastest on it (with the M950/M951 shifter) and there's a 12-32t cassette that goes 12-14-16-18-21-24-28-32 but, the only reason I won't is the gap from 18-21. Maybe if there was a 13-15-17-19-21-24-28-32 and I ran a 53t it migh...

At the high end I found on 700c wheels a 48x12 is alright but if I swap to 26" wheels, that 12t needs to become an 11t, or it just annoys me going down hills. I don't pedal like the clappers, or want to. For a start I'm not clipped into the pedals, or want to be. I want a bike I can just get on...

That's so tempting. :) I have found that a few 11-speed cassettes with a 34t or 36t low sprocket can be used on a standard (9s/10s) freehub body. The SunRace MS8 in an 11-36t will fit on the old hubs. I quite like the spacing on those since they start with 11-12-13t. The 11-speed Shimano CS-HG700 11...