pilot
Thu Mar 13th, 2008, 01:34 PM
Recently, a question was posed as to how to identify the spring rate of a Race Tech spring.
"Speaking on race tech and suspension...
I picked mine up off ebay and I have no clue as to what spring is on there. Does anyone know where the serial number or any information is on the rear shock spring? Mine's red and that's really the only way I've been able to identify it so far. I'm wanting to know if I have to right spring for my weight."
A number may be visible on the end of the spring (if the spring has been used then the number may be worn away). This number may have the rate in kg/mm at the end of it.
One can then go to the race tech site and compare the part numbers with the number found on the spring. This, along with the rider weight calculation chart (on-line at RT) will provide the rider with a good ballpark as to whether or not the spring is close to their needs.
Spring rate can be calculated using a spring rate compressor, home made (use safe methods) or at a bike/car/spring shop, or by doing a bit of measuring and math.
With or without the "rate" information, if the sag rate is correct after install, and adjustment of preload, generally 30-35 mm for street use on sport bikes and 25-30 for the track, then the spring is most likely correct for the rider.
Pilot
"Speaking on race tech and suspension...
I picked mine up off ebay and I have no clue as to what spring is on there. Does anyone know where the serial number or any information is on the rear shock spring? Mine's red and that's really the only way I've been able to identify it so far. I'm wanting to know if I have to right spring for my weight."
A number may be visible on the end of the spring (if the spring has been used then the number may be worn away). This number may have the rate in kg/mm at the end of it.
One can then go to the race tech site and compare the part numbers with the number found on the spring. This, along with the rider weight calculation chart (on-line at RT) will provide the rider with a good ballpark as to whether or not the spring is close to their needs.
Spring rate can be calculated using a spring rate compressor, home made (use safe methods) or at a bike/car/spring shop, or by doing a bit of measuring and math.
With or without the "rate" information, if the sag rate is correct after install, and adjustment of preload, generally 30-35 mm for street use on sport bikes and 25-30 for the track, then the spring is most likely correct for the rider.
Pilot