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Manufacturer Model Year   Claimed Real ± Comments
Fibre-LyteCampagnolo Record/Chorus inner cage plate20046 g6 g±0,00%9/10-speed carbon fibre, 55 mm pulley centresCorrect or complete this entry
Fibre-LyteShimano Dura-Ace/Ultegra inner cage plate20036 g6 g±0,00%9-speed, carbon fibre, 49.4 mm pulley centresCorrect or complete this entry
DMRTension Seeker200391 g92 g+1,10%singlespeed tensioner w/ alloy pulleyCorrect or complete this entry
PaulMelvin (singlespeed tensioner)2003101 gsilver non-anodize color (sure?), incl. all hardwareCorrect or complete this entry
RohloffKettenspanner 8250 (chain tensioner)2001110 g106 g−3,64%spacers +2 g; weight claim is for '03 modelCorrect or complete this entry
SurlySingulator2001107 gchain tensioner for singlespeedCorrect or complete this entry
DMRSTS Simple Tension Seeker2007103 g118 g+14,56% Correct or complete this entry
CarbonSportsLightweight RD2008120 g122 g+1,67%shifts not really good compared to Campy or ShimanoCorrect or complete this entry
SurlySingulator2004124 gchain tensioner for singlespeedCorrect or complete this entry
SRAMRed2010153 g143 g−6,54% Correct or complete this entry
SRAMRed2008153 g146 g−4,58% Correct or complete this entry
ShimanoDura-Ace RD-7900-SS2009166 g165.5 g−0,30%averaged (165/166)Correct or complete this entry
TisoSereo 1302007167 g167 g±0,00% Correct or complete this entry
SuntourCyclone M-II1985170 g Correct or complete this entry
MavicSSC 8511986165 g171 g+3,64%non-indexed, dark grey ano., held together w/ circlips, cartridge bearing pulleys, adjustable lower cageCorrect or complete this entry
SuntourCyclone M-II GT1984172 gFriction derailleur, long cage touring modelCorrect or complete this entry
ShimanoDura-Ace RD-7800-SS (tuned)2004173 gw/ SRP Al bolt kit (hanger, pulleys, cable clamp)Correct or complete this entry
CampagnoloSuper Record 11s2010172 g174 g+1,16% Correct or complete this entry
SRAMForce2010178 g174 g−2,25% Correct or complete this entry
SuntourCyclone1980175 gThis is a 1973 modelCorrect or complete this entry
Precision BilletProshift2002176 g67 mm (year correct?)Correct or complete this entry
ShimanoDura-Ace RD-7800-SS (tuned)2005176 gw/ SRP Al bolt kitCorrect or complete this entry
TisoSereo 1302003177 g177 g±0,00% Correct or complete this entry
Precision BilletProshift MK22003178 g Correct or complete this entry
SRAMForce2007176 g178 g+1,14%averaged (178/178/178)Correct or complete this entry
TisoAltore 3662003179 g179 g±0,00%dry weight, + 1 g for greaseCorrect or complete this entry
Precision BilletProshift?180 g Correct or complete this entry
ShimanoXTR RD-M972-GS2008180 g180 g±0,00%medium cage, Shadow typeCorrect or complete this entry
CampagnoloRecord 11s2009179 g180 g+0,56% Correct or complete this entry
ShimanoXTR RD-M972-SGS2008182 g181 g−0,55%long cage, Shadow typeCorrect or complete this entry
ShimanoDura-Ace RD-7800-SS2004180 g181.1 g+0,61%9/10-speed compatible, averaged (180/180.5/181/181.6/181.66/182)Correct or complete this entry
SRAMESP 9.0 SL1998182 g182 g±0,00%short cageCorrect or complete this entry
ShimanoDura-Ace RD-7800-SS2007180 g182.4 g+1,33%averaged (182/182.8)Correct or complete this entry
ShimanoDura-Ace RD-7800-SS2005182.6 gaveraged (180/182/186)Correct or complete this entry
CampagnoloRecord 10s2005184 g185 g+0,54%short cage, 10-speedCorrect or complete this entry
CampagnoloRecord 10s2004184 g185.5 g+0,82%short cage, 10-speed, averaged (184/185/186/187)Correct or complete this entry
CampagnoloRecord 10s2004193 g186 g−3,63%medium cage, 10-speedCorrect or complete this entry
PaulCNC rear derailleur1995186 g Correct or complete this entry
ShimanoUltegra RD-6700-SS2012189 g186 g−1,59%10 speed short cageCorrect or complete this entry
CampagnoloRecord 10s2001187 gshort cage, 10-speedCorrect or complete this entry
SRAMESP 9.0 SL1999182 g187 g+2,75%short cageCorrect or complete this entry
CampagnoloRecord 10s2008184 g187 g+1,63%short cage, 10-speedCorrect or complete this entry
CampagnoloRecord 10s2005193 g188 g−2,59%medium cage, 10-speed, averaged (188/188)Correct or complete this entry
CampagnoloRecord 10s2007184 g188 g+2,17%short cage, 10-speedCorrect or complete this entry
CampagnoloSuper Record1983188 g Correct or complete this entry
SRAMRival2007188 g189 g+0,53% Correct or complete this entry
ShimanoUltegra RD-6700-SS2010190 g189.4 g−0,32%short cageCorrect or complete this entry
ShimanoDura-Ace RD-7800-GS2005192 g190 g−1,04%long cage for tripleCorrect or complete this entry
ShimanoXTR RD-M952-GS (tuned)2001192 gshort cage (Ti cable clamp bolt, Al Pivot & pulley bolts)Correct or complete this entry
CampagnoloRecord 10s2002187 g192 g+2,67%short cage, 10-speedCorrect or complete this entry
SachsPlasma1998192 glong cageCorrect or complete this entry
Shimano600 Arabesque1980192 g Correct or complete this entry
TisoVenda?193 g Correct or complete this entry
SRAMPlasma?193 gaveraged (192/194)Correct or complete this entry
SRAMESP 9.0 SL1999198 g193 g−2,53%long cage, fake carbon bodyCorrect or complete this entry
ShimanoSanté RD-50011988193 gshort cageCorrect or complete this entry
SRAMX.O2006194 gCarbon, medium cageCorrect or complete this entry
MicroshiftRD-R69SC2012190 g194 g+2,11%Carbon cage modelCorrect or complete this entry
ShimanoXTR RD-M952-GS (tuned)2002194.8 gAl cable clamp, fixing bolt and pulley bolts, Fibre Lyte carbon inner plate, drilled pulleysCorrect or complete this entry
ShimanoDura-Ace RD-77002001195 g195 g±0,00%max 27T.Correct or complete this entry
ShimanoDura-Ace RD-77001999195 g195 g±0,00% Correct or complete this entry
ShimanoDura-Ace RD-77002003195 g196 g+0,51%max. 27T.Correct or complete this entry
CampagnoloRecord 10s2003193 g196 g+1,55%medium cage, 10-speedCorrect or complete this entry
ShimanoXTR RD-M971-GS2007196.8 gshort cage, top normal, averaged (196.5/197/197)Correct or complete this entry
ShimanoDura-Ace RD-77002002195 g197 g+1,03%max 27T.Correct or complete this entry
SRAMESP 9.0 SL?198 g Correct or complete this entry
ShimanoXTR RD-M960-GS2003198 g198 g±0,00%Low Normal Rear Derailleur, averaged (197/198/199)Correct or complete this entry
ShimanoXTR RD-M971-SGS2007198 glong cage, top normal, averaged (197/199)Correct or complete this entry
ShimanoXTR RD-M960-GS2004198 g199 g+0,51%short cageCorrect or complete this entry
ShimanoXTR RD-M970-SGS2007199 g199 g±0,00%long cage, low normalCorrect or complete this entry
SRAMQuarz?200 g Correct or complete this entry
ShimanoXTR RD-M960-SGS2003200 glong cageCorrect or complete this entry
SRAMX.O2003200 g200 g±0,00%medium cageCorrect or complete this entry
ShimanoXTR RD-M9501997200 gpulleys and cable bolts tunedCorrect or complete this entry
ShimanoUltegra RD-6700-GS2010199 g200 g+0,50%long cageCorrect or complete this entry
SuntourSuperbe Pro 8s1989201 gshort cage, year is 1989 or laterCorrect or complete this entry
Shimano600 RD-62071984201 gshort cageCorrect or complete this entry
ShimanoUltegra SL RD-6600G-SS2009201 gshort cageCorrect or complete this entry
CampagnoloChorus 10s2004202 g203 g+0,50%short cage, 10-speed, averaged (200/206)Correct or complete this entry
ShimanoXTR RD-M960-SGS2005203 glong cage, averaged (202/204)Correct or complete this entry
ShimanoXTR RD-M960-SGS2004203 glong cageCorrect or complete this entry
suntourVx1980203 gShort cageCorrect or complete this entry
SRAMX.02002208 g204 g−1,92%long cage, avrg (206/210)Correct or complete this entry
CampagnoloRecord 10s2003205 g204 g−0,49%long cage, 10-speedCorrect or complete this entry
CampagnoloChorus 10s2005202 g204 g+0,99%short cage, 10-speed, averaged (203/205)Correct or complete this entry
ShimanoXTR RD-M952-GS (tuned)2001205 gshort cage (Ti & Al bolts)Correct or complete this entry
SRAMX.O2004200 g205 g+2,50%medium cage, averaged (204/206)Correct or complete this entry
ShimanoUltegra RD-6600-SS2005209 g205 g−1,91%short cageCorrect or complete this entry
ShimanoUltegra RD-6600-SS2006209 g206 g−1,44%short cageCorrect or complete this entry
SRAMX.92007212 g206 g−2,83%short cageCorrect or complete this entry
ShimanoUltegra RD-6600-SS2007209 g206 g−1,44%short cageCorrect or complete this entry
ShimanoXTR RD-M952-GS1999207 g207 g±0,00%short cageCorrect or complete this entry
SRAMPlasma D.I.R.T.2001207 g Correct or complete this entry
ShimanoDura-Ace RD-74101996207 g8 speed, max 26T.Correct or complete this entry
ShimanoXTR RD-M953-SGS1999207 g207 g±0,00%long cage, Rapid RiseCorrect or complete this entry
ShimanoXTR RD-M950-GS1997207 gshort cageCorrect or complete this entry
SRAMX.O2005204 g207.5 g+1,72%medium cage, averaged (207/208)Correct or complete this entry
CampagnoloRecord1990208 g6/7-speedCorrect or complete this entry
ShimanoDura-Ace RD-74011987209 g Correct or complete this entry
ShimanoXTR RD-M952-GS2002210 gshort cageCorrect or complete this entry
SRAMX.O2003210 g210.5 g+0,24%long cage, averaged (210/211)Correct or complete this entry
ShimanoXTR RD-M952-GS2000207 g211 g+1,93%short cageCorrect or complete this entry
SRAMX.O2004210 g211 g+0,48%long cage, averaged (210/212)Correct or complete this entry
CampagnoloChorus 10s2003209 g212 g+1,44%short cage, 10-speed, using a Fiberlyte back plate saves 4 gCorrect or complete this entry
SuntourVx-S1980213 gThis 1979 derailleur has a mid-length cageCorrect or complete this entry
ShimanoXTR RD-M9001993214 gmedium cage, tuned w/ Al mounting boltCorrect or complete this entry
SuntourCyclone 70001986214 g Correct or complete this entry
ShimanoUItegra RD-6500-SS1998215 g216 g+0,47%short cageCorrect or complete this entry
ShimanoDeore XT RD-M750-GS (tuned)2002217 gshort cage, fixing bolt replaced w/ SRP Al boltCorrect or complete this entry
ShimanoUltegra RD-6600-GS2008219 g217 g−0,91%long cageCorrect or complete this entry
ShimanoUltegra RD-6500-SS2003215 g217.1 g+0,98%short cage, max. 27T., averaged (216.2/218)Correct or complete this entry
ShimanoUltegra RD-6500-SS2001215 g218 g+1,40%short cage, max. 27T.Correct or complete this entry
ShimanoDeore RD-DE101982218 gmiddle cageCorrect or complete this entry
ShimanoXTR RD-M9101995219 gaveraged (218/220)Correct or complete this entry
SRAMX.92007219.87 gmedium cage, manufactured 09 May 07, Mettler PM2000 balanceCorrect or complete this entry
Shimano105 RD-5600-SS2009221 g220 g−0,45%short cage, max 27 T.Correct or complete this entry
ShimanoDura-Ace Di2 RD-79702010225 g221 g−1,78% Correct or complete this entry
ShimanoDeore XT RD-M772-GS2008227 g223 g−1,76%medium cageCorrect or complete this entry
ShimanoDeore XT RD-M737 (tuned)1994224 gtuned w/ Al hanger boltCorrect or complete this entry
ShimanoUltegra RD-6500-GS2004221 g225 g+1,81%long cageCorrect or complete this entry
ShimanoDeore XT RD-M772-SGS2008225.5 glong cage, Shadow type, averaged (225/226)Correct or complete this entry
CampagnoloDaytona2002226 gshort cage, 9-speedCorrect or complete this entry
CampagnoloCentaur 10s2003226.8 gshort cage, 10-speedCorrect or complete this entry
Shimano105 RD-5501-SSL2004228 g229 g+0,44%short cage, blackCorrect or complete this entry
Shimano105 RD-5500-GS2003232 g229 g−1,29%long cageCorrect or complete this entry
CampagnoloCentaur 10s2003229 g230 g+0,44%medium cage, 10-speedCorrect or complete this entry
ShimanoDeore XT RD-M760-GS2004232 g230 g−0,86%short cageCorrect or complete this entry
ShimanoSaint RD-M810-SS2009240 g230 g−4,17% Correct or complete this entry
ShimanoDeore XT RD-M760-GS2005232 g231 g−0,43%short cageCorrect or complete this entry
ShimanoXTR RD-M952-SGS1999233 glong cageCorrect or complete this entry
ShimanoXTR RD-M952-SGS2002235.75 glong cage, averaged (234/235/236/238)Correct or complete this entry
ShimanoXTR RD-M952-SGS2000236 glong cageCorrect or complete this entry
SRAMX.92005237.3 gmedium cage, averaged (236/236/240)Correct or complete this entry
Shimano105 RD-10511987238 gshort cageCorrect or complete this entry
SachsQuartz1998239 g Correct or complete this entry
SRAMESP 4.02001239 glong cage, averaged (237/241)Correct or complete this entry
SRAMX.92006238 g239 g+0,42%long cageCorrect or complete this entry
ShimanoDeore XT RD-M7371994240 glong cageCorrect or complete this entry
MavicZAP1996241 g319 g total weight incl. electronic shifters and batteriesCorrect or complete this entry
ShimanoDeore XT RD-M750-GS2000245 g242 g−1,22% Correct or complete this entry
SRAMX.92005244.5 glong cage, averaged (243/246)Correct or complete this entry
ShimanoDeore XT?245 g Correct or complete this entry
ShimanoDeore XT RD-M750-SGS2003255 g246 g−3,53%long cageCorrect or complete this entry
CampagnoloRecord1996247 g8-speedCorrect or complete this entry
ShimanoDeore XT RD-M750-SGS1999255 g247 g−3,14%long cageCorrect or complete this entry
SRAMESP 9.0 SL2001248 g Correct or complete this entry
SRAMX.92004248.5 gmedium cage, averaged (245/252)Correct or complete this entry
ShimanoDeore LX1998249 gshort cage(?)Correct or complete this entry
ShimanoDeore XT1998249 g Correct or complete this entry
CampagnoloVeloce 10s2007250 g249 g−0,40%short cage, 10-speedCorrect or complete this entry
SRAMESP 9.0 SL medium cage2002250 g Correct or complete this entry
SRAMESP 7.02002253 g Correct or complete this entry
ShimanoDeore XT RD-M750-SGS2002255 g255 g±0,00%long cageCorrect or complete this entry
ShimanoDeore II RD-MT621989255 gShort CageCorrect or complete this entry
Shimano105 RD-10501987257 gshort cageCorrect or complete this entry
CampagnoloXenon2004254 g257 g+1,18%short cage, 9-speedCorrect or complete this entry
ShimanoTiagra RD-4500-SS2007257 g Correct or complete this entry
SRAMESP 9.02001258 g Correct or complete this entry
CampagnoloAthena1994258 gshort cage, 8-speedCorrect or complete this entry
SRAMX.92004255 g260 g+1,96%long cageCorrect or complete this entry
CampagnoloXenon 9s2004263 g261 g−0,76%long cage, 9-speed, not 100% sure of yearCorrect or complete this entry
ShimanoSLX RD-M662-SGS2008258 g261.5 g+1,36%averaged (261/262)Correct or complete this entry
SuntourXC 9010 Accushift1989264 glong cageCorrect or complete this entry
SRAMESP 9.02003265 g Correct or complete this entry
ShimanoDeore XT RD-M760-SGS2004265.25 glong cage, averaged (263/265/266/267)Correct or complete this entry
ShimanoDeore XT RD-M761-SGS2007265 g266.6 g+0,60%long cage, averaged (266/267/267)Correct or complete this entry
SRAMX.72004268 glong cageCorrect or complete this entry
SRAMX.72007270 g268 g−0,74%long cageCorrect or complete this entry
SRAMX.72005275 g270 g−1,82%long cageCorrect or complete this entry
ShimanoAcera X1997271 glong cageCorrect or complete this entry
ShimanoExage Motion RD-A2501989271 gshort cageCorrect or complete this entry
ShimanoSky Lark1967273 gshort cage, incl. integrated derailleur hanger, from late 60sCorrect or complete this entry
ShimanoAlivio RD-MC141996280 g279 g−0,36%long cageCorrect or complete this entry
ShimanoDeore LX1998281 glong cageCorrect or complete this entry
SR SuntourRD-Durolux-SGX2005281 gcompatible w/ Shimano & ESP, pulleys 13T/15T, capacity 45TCorrect or complete this entry
ShimanoAltus C10 RD-CT10-SGS1993282 glong cageCorrect or complete this entry
ShimanoTiagra RD-4400-GS2003280 g283 g+1,07%long cage, 9 -peed for road triplesCorrect or complete this entry
SRAMESP 7.02000286 glong cageCorrect or complete this entry
ShimanoDeore LX RD-M5701999288 glongCorrect or complete this entry
Shimano2200 RD-22002002288 g8-speedCorrect or complete this entry
ShimanoSTX-RC RD-MC381997292 glong cageCorrect or complete this entry
ShimanoCapreo RD-F7002004292 g9-speed, 86 mm cageCorrect or complete this entry
ShimanoTourney 101988294 gshort cageCorrect or complete this entry
ShimanoDeore RD-M5102001300 g296 g−1,33%long cage, blackCorrect or complete this entry
SuntourNCX-6002001297 g Correct or complete this entry
ShimanoDeore RD-M5102003300 g300 g±0,00%long cageCorrect or complete this entry
ShimanoDeore RD-M510-L2004300 g301 g+0,33%long cageCorrect or complete this entry
SuntourSeven1977308 gshort cageCorrect or complete this entry
ShimanoDeore LX RD-M580-SGS2005311 g308 g−0,96%long cageCorrect or complete this entry
ShimanoDeore DX RD-M650-SGS1993320 g310 g−3,13%long cageCorrect or complete this entry
ShimanoAlivio RD-M4102007312 gaveraged (312/312)Correct or complete this entry
ShimanoExage 300LX RD-M300-SGS1991317 glong cageCorrect or complete this entry
ShimanoDeore RD-M5302007316 g317.5 g+0,47%averaged (317/318)Correct or complete this entry
ShimanoMountain LX RD-M4521989320 g319 g−0,31%SGS Super Long CageCorrect or complete this entry
SRAMESP 5.02002320 g Correct or complete this entry
ShimanoAltus RD-CT952007325 gaveraged (324/326)Correct or complete this entry
ShimanoAcera RD-M340-L2004338 glong cage, 7/8-speed, blackCorrect or complete this entry
ShimanoDeore XT RD-M750-GS2002245 gshort cageCorrect or complete this entry
ShimanoDeore RD-M510-L2002300 glong cageCorrect or complete this entry
ShimanoDeore LX RD-M5702002288 glong cageCorrect or complete this entry
ShimanoTiagra RD-4400-SS2003265 gfor double crankCorrect or complete this entry



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