What is the difference between M770 and M771?
Cheers (lost mine in the heather today!!!)
Bike Forum
[closed]
Xt rear mech........heeelp!
-
Posted 1 year ago #
-
Shimano M770 XT Rear Derailleur - Low Normal (i.e. Rapid Rise)
Shimano M771 XT Rear Derailleur - Top Normal (i.e. Normal)Hope this is correct!
Posted 1 year ago # -
Yup 770 is rapid rise
Posted 1 year ago # -
771 description on Merlin: Top normal spring uses the spring to select higher gears, best suited to use with Rapidfire shifters
770 Description on Merlin: Low normal spring uses the spring to select lower gears, best suited to use with Dual Control leversConfused!!
Posted 1 year ago # -
Bothwork fine with rapid fire. 771 is conventional set up.
Posted 1 year ago # -
Good, it is cheaper ;-D
NOW, the other question, should I go shadow for another tenner?!?!
Posted 1 year ago # -
I have one spare if you want? a RR one that is
Posted 1 year ago # -
Really? A new one? How much would you like for it?
Posted 1 year ago # -
its not new but fully serviceable. £10
Posted 1 year ago # -
OOOh, yes please!!!
I'll e-mail you details and you can tell me how much for postage etc
Cheers all for assistance on this one!!!
Posted 1 year ago # -
just to clarify its the Rapid rise one i.e. 770. although it still work with either shifters I wouldn't want to send you the wrong one! I'll find out postage costs for you. I'll send you some pics of it before you send any money.
Posted 1 year ago # -
Okey doke, would be good to see some pikkys....Cheers
Posted 1 year ago # -
here you go
Posted 1 year ago # -
HiCli.... you know what I think I am going to go for a new one. I do a fair few miles in the lakes and for the extra £30 (which I just won on the footy sweepstake!) I think it is worth it. Thank you for the offer though
Posted 1 year ago # -
Lol, well done on the win, no worries
Posted 1 year ago # -
Just in case you were still looking for a rear mech.. Ribble are doing the XT Shadow for £33 ish... I ordered one on Tuesday night and it turned up Thursday am.
Paul
Posted 1 year ago # -
As said,
771 - Top normal, i.e if you release all the tension in the cable the mech will sit over the smallest rear sprocket, i.e. the highest/top gear. If you want go uphill you have to press the shifter against the action of the spring to select lower gears. If you want to shift to a higher gear just press the release shifter and the spring action will shift up for you. This is the conventional set-up and works well with Rapidfire shifters
770 Low normal, i.e. if you release all the tension in the cable the mech will sit over the largest rear sprocket, i.e. the lowest gear. If you want to go faster you have to press the shifter against the action of the spring, but it has the advantage (depending on your point of view) that when shifting to lower gears when going up hill the spring action does the shifting so you get very quick down-shifts, i.e. rapid rise of the mech up the sprockets from the smallest to the largest. These work great with dual Control levers but work just as well with rapid fire. It just depends on whether you want quick upshifts (rapid rise 770) or quick downshifts (conventional 771).Still confused??
Speaking to the Shimano bloke at Bike radar yesterday he said there is going to be no more rapid rise on future Shimano drivetrain and that there will be no dual control for the dynasis 10 speed stuff.
Posted 1 year ago # -
TeaboyPaul thankyou for the PSA - I shall be purching one ASAP!!!
Posted 1 year ago #
Topic Closed
This topic has been closed to new replies.
