Search found 1439 matches

by Manc33
20 Oct 2019, 7:16pm
Forum: Bikes & Bits – Technical section
Topic: Shadow MTB rear mechs Vs older design - old tucks into smaller sprockets better?
Replies: 16
Views: 653

Re: Shadow MTB rear mechs Vs older design - old tucks into smaller sprockets better?

Cheers Brucey you're a tome of info. I'm going back to the old design. The chain can slap all it wants. :lol:
by Manc33
20 Oct 2019, 4:02pm
Forum: Bikes & Bits – Technical section
Topic: Shadow MTB rear mechs Vs older design - old tucks into smaller sprockets better?
Replies: 16
Views: 653

Re: Shadow MTB rear mechs Vs older design - old tucks into smaller sprockets better?

Back then though cassettes typically had far smaller low sprockets, so it not being sprung at the fixing bolt wouldn't make as much of a difference to shifting performance. These days, 12-Speed cassettes are going up to a 51t (from a 10t) without the spring being there.
by Manc33
20 Oct 2019, 3:41pm
Forum: Bikes & Bits – Technical section
Topic: Shadow MTB rear mechs Vs older design - old tucks into smaller sprockets better?
Replies: 16
Views: 653

Re: Shadow MTB rear mechs Vs older design - old tucks into smaller sprockets better?

lol, so Shimano were being innovative adding it... but have again now taken it away. Just as the next generation of youngsters comes along to be made to think taking the spring away is an innovation. They will add it again in 30 years time. :lol:
by Manc33
18 Oct 2019, 6:16pm
Forum: Bikes & Bits – Technical section
Topic: Shadow MTB rear mechs Vs older design - old tucks into smaller sprockets better?
Replies: 16
Views: 653

Re: Shadow MTB rear mechs Vs older design - old tucks into smaller sprockets better?

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 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 small...
by Manc33
18 Oct 2019, 12:14am
Forum: Bikes & Bits – Technical section
Topic: Weird knocking noise
Replies: 5
Views: 304

Weird knocking noise

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...
by Manc33
17 Oct 2019, 6:31pm
Forum: Bikes & Bits – Technical section
Topic: Shadow MTB rear mechs Vs older design - old tucks into smaller sprockets better?
Replies: 16
Views: 653

Re: Shadow MTB rear mechs Vs older design - old tucks into smaller sprockets better?

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 ...
by Manc33
16 Oct 2019, 10:10pm
Forum: Bikes & Bits – Technical section
Topic: Shadow MTB rear mechs Vs older design - old tucks into smaller sprockets better?
Replies: 16
Views: 653

Re: Shadow MTB rear mechs Vs older design - old tucks into smaller sprockets better?

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.
by Manc33
16 Oct 2019, 4:29pm
Forum: Bikes & Bits – Technical section
Topic: Shadow MTB rear mechs Vs older design - old tucks into smaller sprockets better?
Replies: 16
Views: 653

Re: Shadow MTB rear mechs Vs older design - old tucks into smaller sprockets better?

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...
by Manc33
16 Oct 2019, 12:27pm
Forum: Bikes & Bits – Technical section
Topic: Shadow MTB rear mechs Vs older design - old tucks into smaller sprockets better?
Replies: 16
Views: 653

Shadow MTB rear mechs Vs older design - old tucks into smaller sprockets better?

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...
by Manc33
16 Oct 2019, 11:55am
Forum: Bikes & Bits – Technical section
Topic: Is the gap between middle and outer the same as between inner and middle?
Replies: 11
Views: 499

Re: Is the gap between middle and outer the same as between inner and middle?

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 ...
by Manc33
14 Oct 2019, 6:40am
Forum: Bikes & Bits – Technical section
Topic: Is the gap between middle and outer the same as between inner and middle?
Replies: 11
Views: 499

Re: Is the gap between middle and outer the same as between inner and middle?

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...
by Manc33
12 Oct 2019, 7:26pm
Forum: Bikes & Bits – Technical section
Topic: Is the gap between middle and outer the same as between inner and middle?
Replies: 11
Views: 499

Re: Is the gap between middle and outer the same as between inner and middle?

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...
by Manc33
12 Oct 2019, 4:02pm
Forum: Bikes & Bits – Technical section
Topic: Is the gap between middle and outer the same as between inner and middle?
Replies: 11
Views: 499

Is the gap between middle and outer the same as between inner and middle?

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...
by Manc33
11 Oct 2019, 11:41am
Forum: Bikes & Bits – Technical section
Topic: Anyone using an 11-speed 11-42t (or similar) with a triple chainset?
Replies: 64
Views: 2477

Re: Anyone using an 11-speed 11-42t (or similar) with a triple chainset?

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...
by Manc33
3 Oct 2019, 7:12pm
Forum: Bikes & Bits – Technical section
Topic: Cartridge bearing is rough when pressed in, but fine when taken out
Replies: 22
Views: 835

Re: Cartridge bearing is rough when pressed in, but fine when taken out

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. :roll: