The Bike-E I bought on E-Bay wasn't packed too well, and the derailleur pivot bolt fell out of the derailleur, then out of the hole in the bottom of the box. It looks like the easiest way to get this bike in service will be to replace the whole rear derailleur. But is this beast a 1:1 (new SRAM ESP ratio) or a 1:2 (Shimano standard) ratio derailleur?
Neither the derailleur nor the shifters look like anything in the current SRAM lineup. I did get a SRAM MRX/MRX Plus instruction booklet, but I'm not sure that it applies; the shifter I've got says "Sachs" and "3X7"
[email hidden] (Ryan Young) wrote in message news:<[email hidden]>...
Quoted message said:
The Bike-E I bought on E-Bay wasn't packed too well, and the derailleur pivot bolt fell out of the derailleur, then out of the hole in the bottom of the box. It looks like the easiest way to get this bike in service will be to replace the whole rear derailleur. But is this beast a 1:1 (new SRAM ESP ratio) or a 1:2 (Shimano standard) ratio derailleur?
Neither the derailleur nor the shifters look like anything in the current SRAM lineup. I did get a SRAM MRX/MRX Plus instruction booklet, but I'm not sure that it applies; the shifter I've got says "Sachs" and "3X7"
I've found mixed references to exactly which derailleur came on your bike- which is what's relevant. If it's a SRAM 5.0 (or anything ending in ".0"😉, it's a SRAM 1:1 ratio unit. If not, it's the 1:2 ratio, which means any current Shimano derailleur will work.
[email hidden] (Jeff Wills) wrote in message news:<[email hidden]>...
Quoted message said:
[email hidden] (Ryan Young) wrote in message news:<[email hidden]>...
Quoted message said:
The Bike-E I bought on E-Bay wasn't packed too well, and the derailleur pivot bolt fell out of the derailleur, then out of the hole in the bottom of the box. It looks like the easiest way to get this bike in service will be to replace the whole rear derailleur. But is this beast a 1:1 (new SRAM ESP ratio) or a 1:2 (Shimano standard) ratio derailleur?
Neither the derailleur nor the shifters look like anything in the current SRAM lineup. I did get a SRAM MRX/MRX Plus instruction booklet, but I'm not sure that it applies; the shifter I've got says "Sachs" and "3X7"
I've found mixed references to exactly which derailleur came on your bike- which is what's relevant. If it's a SRAM 5.0 (or anything ending in ".0"😉, it's a SRAM 1:1 ratio unit. If not, it's the 1:2 ratio, which means any current Shimano derailleur will work.
Jeff
I've done a bunch more research, and my conclusion is that all but the very last bikes built used the 1:2 ratio. If your Bike-E has a five bolt crank, it uses the 1:2 ratio. Four bolts on the crank, it's one of the last 2 years of production (which ceased in 2002), and it MAY have a 1:1 unit. If the 3X7 is actually a 3X8, and uses cassettes, it's very likely a 1:1.
