Aug
2
Shimano XT RD-M771 Rear Derailleur help?
Would the Shimano XT RD-M771 Rear Derailleur work with an 8-speed bike? And what do terms like “mid” and “long” cage, and SGS and GS (top normal?) mean?
Yes, it will work. Your rear derailleur has no idea how many cogs there are in a cassette. This relates solely to your shifters, assuming they are indexed. So, “10 speed” derailleurs work fine on 8 speed bikes (or 5 speeds, for that matter). There are two limits to set, high and low gear, and virtually all derailleurs have the same range capability. See the link I’ve posted below.
Cage length affects the overall gear range you can accommodate, and long cages are typically used on mountain bikes and road bikes with triple cranks in the front. The purpose of the longer cage is to to take up more chain slack. A long cage will work just fine on a double setup with a narrow gear ratio; it just won’t shift quite as crisply, and is not necessary.
Most rear derailleurs are high normal. That means that the derailleur spring, unimpeded, will bring the chain to rest on your high gear (smallest cog) in the rear. A few years ago Shimano introduced “Rapid Rise” in its XTR mountain bike line, which is a low normal setup. This reverses the shifting, and the spring is trying to push the chain onto the lowest (bottom) cog — the largest one, closest to the hub. I tried it and didn’t like simply because it required shifting in the opposite direction to that which I had become accustomed.
SGS and GS are Shimano terms. GS is mid cage length and SGS is long.
Cambio Shimano XT Rapid Rise M770 SGS
|
|
Shimano Yumeya carbon rear derailleur plates for XTR RD-M970SGS / RD-M971SGS $148.30 |
|
|
New Shimano XT RD-M780 Dyna Sys Rear Derailleur Shadow SGS 10sp Black $83.99 |
|
|
Shimano SGS Top normal Shadow Rear Derailleur $99.99 |
|
|
Shimano SLX RD-M662 SLX Shadow top normal rear derailleur SGS $78.56 |
|
|
Shimano Deore XT RD-T780 10-speed Shadow rear derailleur SGS top normal silver $102.14 |
|
|
Shimano Deore XT, RD-M771 SGS long cage rear derailleur $20.00 |
|
|
NEW Shimano Rear Derailleur RD-M737 SGS Deore XT In Box w/ Instructions $19.99 |
|
|
Shimano XTR RD-M980 10 Speed Rear Wheel Derailleur, SGS $209.99 |
|
|
Shimano XTR M972 SGS 9 Speed Rear Derailleur NEW in Box $188.95 |
|
|
SHIMANO DEORE XT MOUNTAIN BIKE REAR DERAILLEUR RD-M750 MEGA 9 SPEED SGS LONGCAGE $19.99 |
|
|
Shimano SLX RD-M662 SGS Shadow Rear Derailleur Long Cage 9 Speed New OEM $20.00 |
|
|
Shimano LX Rear Derailleur RD-M580 SGS, New in Box $41.81 |
|
|
Shimano XT RD-M772 SGS Shadow Rear Derailleur Long Cage 9 Speed New OEM $84.99 |
|
|
Shimano M530 Deore SGS Rear Derailleur $45.99 |
|
|
SHIMANO XTR M-980-SGS REAR DERAILLEUR M980 SGS 10 Speed $190.00 |
|
|
Shimano XT RD-M772 SGS Shadow Rear Derailleur NEW $86.87 |
|
|
Shimano XTR RD-M985 10 Speed Shadow Carbon Rear Derailleur SGS Long Cage M985 $239.99 |
|
|
Shimano RD-TX35 Tourney Rear Derailleur (SGS Long Cage 6/7 Speed Regular Mount) $18.34 |
|
|
SHIMANO HONE RD-M601 SGS MOUNTAIN BIKE 9 SPEED REAR DERAILLEUR NEW $49.00 |
|
|
BRAND NEW SHIMANO DEORE XT RD-M771 SGS REAR DERAILLEUR $70.00 |
|
|
BRAND NEW SHIMANO DEORE XT RD-M772 SGS REAR DERAILLEUR $75.00 |
|
|
Shimano XT RD M773 Dyna-Sys SGS Shadow Rear Derailleur 10Speed $67.00 |
|
|
Shimano SLX M662 SGS 9-Speed Rear Derailleur $74.99 |
|
|
Shimano Deore RD-M531 SGS MTB 8/9 Speed MTB Rear Derailleur Black Long Cage $51.95 |
|
|
NEW Shimano Deore RD-M591 SGS Long Cage BLACK MTB Rear Derailleur Top Normal $55.00 |
|
|
Shimano Deore XT SGS Rear Derailleur $0.01 |
|
|
Shimano XTR RD-M952 Rear Derailleur SGS Long Cage $60.00 |
|
|
Shimano XT M780 SGS Long-Cage 10-speed Shadow Rear Derailleur $117.28 |
|
|
Shimano Deore M591 SGS Long Cage 9-speed Rear Derailleur Silver $57.79 |
|
|
Shimano Acera M360 SGS Rear Derailleur Black 8-speed $24.62 |
|
|
SLX M663 10-speed SGS Shadow Rear Derailleur $72.71 |
|
|
Shimano Alivio M410-SGS 8-speed Rear Derailleur Silver $35.15 |
|
|
Shimano Deore M591 SGS Long Cage 9-speed Rear Derailleur Black $57.89 |
|
|
Shimano Deore M593 SGS 10 speed Shadow Rear Derailleur $64.12 |
|
|
Shimano SLX M662-SGS Top-Normal Rear Derailleur 9-Speed $81.87 |
|
|
Shimano XTR M972-SGS Top Normal Shadow Rear Derailleur 9-Speed $323.79 |
|
|
Shimano XTR M985 SGS 10-speed Shadow Plus Rear Derailleur $265.89 |
|
|
Shimano XT M772-SGS Top Normal Shadow Rear Derailleur 9-speed $118.17 |
|
|
Shimano Acera M360 SGS Rear Derailleur Silver 8-speed $24.62 |
|
|
XTR M980 SGS 10-speed Rear Derailleur Shadow $236.35 |
|
|
Shimano Deore M592 SGS Shadow Long Cage 9-speed Rear Derailleur Black $64.58 |
|
|
Shimano Alivio M410-SGS 8-speed Rear Derailleur Black $35.15 |
|
|
Shimano Deore RD-M531 SGS MTB 8/9 Speed MTB Rear Derailleur Silver Long Cage $49.95 |
|
|
Shimano 105 9/10spd Rear Derailleur RD-5600 SGS (longcage) $56.00 |
|
|
Shimano SLX Shadow M662 9-Speed Long Cage SGS Rear Derailleur *NEW + FREE SHIP* $59.99 |
|
|
Shimano Deore XT RD-M739 SGS (Long Cage) Rear Derailleur NEW Retro $47.15 |
|
|
Shimano Alivio M410 SGS Rear Derailleur 8 Speed New $31.27 |
|
|
Shimano SLX Dyna Sys Rear Derailleur RD-M663 SGS 10spd $55.95 |
|
|
Shimano XT Dyna Sys Rear Derailleur RD-M773 SGS 10-spd $71.95 |
|
|
2011 Shimano Deore Rear Derailleur RD M591-SGS $41.95 |
|
|
2011 SLX Top Normal Rear Derailleur Shadow RD M662-SGS $52.95 |
|
|
Shimano XTR Dyna Sys Rear Derailleur RD-M985 SGS 10spd $241.95 |
|
|
2011 Shimano XT Low Normal Rear Derailleur RD-M770-SGS $74.95 |
|
|
2011 Shimano Deore Rear Derailleur Shadow RD M592-SGS $41.95 |
|
|
2011 XT Top Normal Rear Derailleur Shadow RD M772-SGS $74.95 |
|
|
FAST FREE US Ship Shimano XT RD-M780 SGS Rear Derailleur NEW 10 Speed NIB $82.99 |
|
|
SHIMANO DEORE XT M771 REAR DERAILLEUR SGS LONG CAGE $88.00 |
|
|
Shimano Alivio M410-SGS Rear Derailleur Black $39.42 |
|
|
NEW Shimano XT RD-M773 SGS Dyna-Sys Shadow 10 Speed Long Cage Rear Derailleur $79.00 |
|
|
NEW Shimano SLX RD-M662 SGS Shadow Rear Derailleur MTB, Long Cage 9 Speed $58.80 |
|
|
Shimano M980 XTR Shadow Rear Derailleur SGS Long Cage $174.79 |
|
|
NIB Shimano RD-M800 Saint Rear Derailleur SGS Long Cage NR $20.00 |
|
|
Shimano Alivio M410-SGS Rear Derailleur Silver 8 Speed Compatible NEW FREE SHIP $15.61 |
|
|
NEW Shimano XTR RD-M980-10s Rear Derailleur – SGS Long Cag $20.50 |
|
|
FAST FREE US Ship Shimano XT RD-M772 SGS Rear Derailleur NEW 9 Speed NIB $84.49 |
|
|
SHIMANO HONE MTB Mountain Bike Rear Derailleur RD-M600-SGS – Vertical Drop Out $14.99 |
|
|
Shimano RD-M773 XT Rear Derailleur SGS – 10 Speed- New $53.45 |
|
|
Shimano SLX M662-SGS Top-normal Mtb Rear Derailleur $83.93 |
|
|
2012 XT Dyna Sys Rear Derailleur RD-M780 SGS **BLACK** $76.95 |
|
|
New Deore Dyna Sys Rear Derailleur RD-M593 SGS 10-spd $49.95 |
|
|
SHIMANO XTR M980 REAR DERAILLEUR SGS LONG CAGE $195.00 |
|
|
Shimano XT M772-SGS Top normal Shadow Rear Derailleur $107.91 |
|
|
Shimano RD-M592 Deore Shadow SGS 9 Speed Rear Bicycle Derailleur Black $54.25 |
|
|
Rear Derailleur Shimano RD-M662 SLX SGS 9s $98.02 |
|
|
Rear Derailleur Shimano RD-M772 SGS XT TOP NORN LO-PROF $148.18 |
|
|
Shimano Deore M591 SGS Long Cage 9 spd Rear Derailleur $71.98 |
|
|
FAST FREE US Ship Shimano Acera RD-M360 SGS SILVER Rear Derailleur NEW 8 Speed $25.99 |
|
|
FAST FREE US Ship Shimano Alivio RD-M430 SGS BLACK Rear Derailleur NIB Bike NEW $34.49 |
|
|
Shimano XTR RD-M972 SGS Shadow Rear Derailleur Long Cage 9 Speed New OEM $161.99 |
|
|
New Shimano Deore XT Rear Derailleur RD-M771 SGS $69.99 |
|
|
NEW Shimano Alivio 7/8 Speed Rear Derailleur Silver NIB RD-M410 SGS $24.99 |
|
|
Derailleur Shimano RD-M390 ACERA SGS 9s Black $44.98 |
|
|
Shimano Acera M360 SGS Rear Derailleur, Silver $27.99 |
|
|
Iron Horse Derailleur Hanger Fits Hollow Point Excursion SGS and others $20.00 |
|
|
**MAKE AN OFFER** Shimano XT M773 SGS 10-Speed Rear Derailleur Long Cage $79.99 |
|
|
New-Old-Stock Shimano RSX Rear Derailleur w/Long Cage (SGS)…Shopwear $79.99 |
|
|
Shimano XTR Dyna Sys Rear Derailleur RD-M980 SGS 10spd $175.95 |
|
|
Shimano XT M772 SGS Rear Derailleur New $91.99 |
|
|
NEW Shimano XTR M985 SGS 10-speed Shadow Plus Rear Derailleur $8 INSTANT REBATE $210.00 |
|
|
Shimano Alivio M410-SGS Rear Derailleur Silver $36.91 |
|
|
Shimano Deore RD-M591 SGS SILVER Mountain Bike Rear Derailleur Urban Hybrid $49.90 |
|
|
Shimano Deore XT RD-M780-SGS Silver Rear Derailleur 10Speed 2012 New $88.50 |
|
|
Shimano Deore XT RD-M780-SGS Black Rear Derailleur 10Speed 2012 New $88.50 |
|
|
Shimano Alivio M410-SGS Rear Derailleur Black $38.91 |
|
|
SLX M663 10-speed SGS Shadow Rear Derailleur $71.99 |
|
|
Shimano Alivio M410-SGS 8-speed Rear Derailleur Silver $34.99 |
|
|
NEW SHIMANO DEORE RD-M531 SGS 8/9 Speed MTB Rear Derailleur Long Cage Silver $45.95 |
|
|
SHIMANO DEORE M593 DYNA SYS SHADOW REAR DERAILLEUR SGS LONG CAGE 10-SPEED BLACK $84.00 |
|
|
XTR M980 SGS 10-speed Rear Derailleur Shadow $226.99 |
|
|
Shimano Deore M591 SGS Long Cage 9-speed Rear Derailleur Black $57.99 |
|
|
Shimano Alivio M410-SGS Rear Derailleur Black Shimano Alivio Rear Derailleurs.Direct-attach rear derailleursAdvanced light-action designTeflon-coated bushingsItem SpecificationsColorBlackWeight312gIntended UseMountainCassette SpacingShimano/SRAM 8Shifter/Derailleur CompatibilityShimanoLargest Cog34teethChain Wrap Capacity43teethDerailleur ActionTop-Normal (Traditional)Cage LengthLong… |
|
|
Shimano RD-TX35 Tourney Rear Derailleur (SGS Long Cage 6/7 Speed Regular Mount) $10.99 Shimano Rear DerailleursAdvanced light-action designTX models come with Smart Cage which gives MegaRange compatibility with a shorter derailleur cageItem SpecificationsIntended UseMountainCassette SpacingShimano/SRAM 7,6-SpeedShifter/Derailleur CompatibilityShimanoLargest Cog34teethChain Wrap Capacity43teethDerailleur ActionTop-Normal (Traditional)… |
|
|
Shimano Acera $24.04 Shimano Acera Rear Derallieurs…. |
