Deore GS or SGS for 11-36 with 50/34 on Gravel Bike
#1
Junior Member
Thread Starter
Join Date: Jul 2015
Location: Northumberland
Posts: 17
Bikes: Raleigh Arena (1985) / FWE Arkose1 (2013) / Cannondale Slate 105 (2017)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Deore GS or SGS for 11-36 with 50/34 on Gravel Bike
Hi
I have a Cannondale Slate 105 which I’m looking to change out the gearing on.
My local rides often involve lots of hills with pavement/tarmac, gravel, cobble / rubble to near-singletrack moorland.
I’ve long since swapped out the 52/36 chainrings for 50/34 but I’m now considering changing out the rear mech and cassette. Ideally I’d like to swap for a Shimano Deore M8000 (with Wolf Components Tanpan cable pull converter) rear mech with either a 11-34 or 11-36 cassette (before anyone asks I’d like a clutched mech not GS road mech mainly to stop losing the chain on rougher ground)
What I’m querying here is whether or not I need to get a M8000 GS or SGS mech.
Shimano states that the GS only has a “front difference” of 10T which I could understand if you were using 11-44 or 11-42 cassette. But I would’ve thought for the 11-34 or 11-36 cassette size (with 50/34 chainrings) I’m looking to use I shouldn’t need to use a (bigger and heavy) SGS mech which Shimano states as having “front difference” of 18 teeth???
Anyone got any experience or feedback on similar set ups?
Would be really appreciated!
I have a Cannondale Slate 105 which I’m looking to change out the gearing on.
My local rides often involve lots of hills with pavement/tarmac, gravel, cobble / rubble to near-singletrack moorland.
I’ve long since swapped out the 52/36 chainrings for 50/34 but I’m now considering changing out the rear mech and cassette. Ideally I’d like to swap for a Shimano Deore M8000 (with Wolf Components Tanpan cable pull converter) rear mech with either a 11-34 or 11-36 cassette (before anyone asks I’d like a clutched mech not GS road mech mainly to stop losing the chain on rougher ground)
What I’m querying here is whether or not I need to get a M8000 GS or SGS mech.
Shimano states that the GS only has a “front difference” of 10T which I could understand if you were using 11-44 or 11-42 cassette. But I would’ve thought for the 11-34 or 11-36 cassette size (with 50/34 chainrings) I’m looking to use I shouldn’t need to use a (bigger and heavy) SGS mech which Shimano states as having “front difference” of 18 teeth???
Anyone got any experience or feedback on similar set ups?
Would be really appreciated!
#2
Occam's Rotor
Join Date: Jul 2013
Posts: 6,742
Mentioned: 61 Post(s)
Tagged: 0 Thread(s)
Quoted: 2366 Post(s)
Liked 1,850 Times
in
919 Posts
I'm using an 11-36T SRAM cassette with an otherwise ultegra setup, just by cranking on the B-screw. It might be worth trying that kind of approach first, before doing anything more drastic (and costly). I ride gravel (and worse) with this and never lose the chain -- I would check your FD adjustment.