2004 EC300 Ohlins Fork Springs

[risk74]

I need to find some heavier springs for my 2004 EC300 with 48mm Ohlins forks, cannot find a supplier or even the dimensions anywhere. I appreciate any help. Thanks.

[philm]

This appears to be the manual for the 48mm forks for the 2005 models at least. It has dimensions listed for the springs.

https://www.ohlins.com/app/uploads/w...M_07295-17.pdf

Have you tried contacting an Ohlins dealer? Are you in the U.S.?

https://www.ohlinsusa.com/ohlins-dealers

[risk74]

Ohlins doesn't even list any springs (part # starting with 02428) for these 48mm forks. I guess I will have to measure them and try to find something comparable from Race Tech.

[philm]

These are the part numbers and specifications from the manual found at https://www.ohlins.com/app/uploads/w...M_07295-17.pdf

Part numbers-Spring rate: (depending on models)
2428-39: 3.9 N/mm
2428-41: 4.1 N/mm
2428-43: 4.3 N/mm
2428-45: 4.5 N/mm
2428-47: 4.7 N/mm

Fork lengths and diameters
Front fork ?48
?A ?B Length (L)
53.9 mm 59.3 mm 938 mm
Front fork ?46
?A ?B Length (L)
53.9 mm 58.4 mm 938 mm
Rebound and compression adjustment
Refer to mounting instruction for set-up data.
Maximum open rebound and compression valve:
20 clicks.
Free Spring Length:
All forks: 467 mm (service limit 460 mm).
Spring preload:
Maximum allowed adjustment
range 4-8 mm (with optional spring supports).

[risk74]

Originally Posted by philm

These are the part numbers and specifications from the manual found at https://www.ohlins.com/app/uploads/w...M_07295-17.pdf

Part numbers-Spring rate: (depending on models)
2428-39: 3.9 N/mm
2428-41: 4.1 N/mm
2428-43: 4.3 N/mm
2428-45: 4.5 N/mm
2428-47: 4.7 N/mm

Fork lengths and diameters
Front fork ?48
?A ?B Length (L)
53.9 mm 59.3 mm 938 mm
Front fork ?46
?A ?B Length (L)
53.9 mm 58.4 mm 938 mm
Rebound and compression adjustment
Refer to mounting instruction for set-up data.
Maximum open rebound and compression valve:
20 clicks.
Free Spring Length:
All forks: 467 mm (service limit 460 mm).
Spring preload:
Maximum allowed adjustment
range 4-8 mm (with optional spring supports).

Thanks, that's what I found too, but they do not seem to be available from Ohlins any more. I found some comparable springs from Race Tech and have ordered those. The only differences is the free length is 472mm, which will give me 5mm of pre-load, which I think I can live with.