T-Bob Posted November 28, 2017 Share Was looking at various things last night and came across dual rate springs in motorcycling and wondered why these aren't available in MTB more. I can see that maybe a lot of the progression in the rear can be built into the frame with the leverage ratio / characteristics of the linkage design. I wondered what the reasons were that these aren't an option for those who what the small bump, no stiction benefits of the coil but have a bit of linear frame. With Cane Creek and others pumping coil forks and the coil upgrades that are being released Is this something we might see more towards the fork part than on rear shocks. @Droo?? Edited November 28, 2017 by hellocolour Link to comment Share on other sites More sharing options...
T-Bob Posted November 28, 2017 Share This kinda thang. Link to comment Share on other sites More sharing options...
ALLMTB Posted November 28, 2017 Share Such as these?https://www.vitalmtb.com/news/news/Introducing-Race-Only-Springs,1088 Perhaps its too costly to produce dual rate spings? I don't know.Good question. T-Bob 1 Link to comment Share on other sites More sharing options...
droo Posted November 28, 2017 Share There are a few drawbacks, so maybe this one is the first to have worked out the kinks. Time will tell I guess, especially with the number of coil forks and shocks coming out at the moment. T-Bob 1 Link to comment Share on other sites More sharing options...
Capricorn Posted November 28, 2017 Share maybe the answer lies in why motorcycles use dual rate springs more (albeit not exclusively). I don't think the answer is simple, and a reductive reason might just confuse the issue more. this looks like a good place to read up about motorcycles and suspension. T-Bob 1 Link to comment Share on other sites More sharing options...
droo Posted November 28, 2017 Share maybe the answer lies in why motorcycles use dual rate springs more (albeit not exclusively). I don't think the answer is simple, and a reductive reason might just confuse the issue more. this looks like a good place to read up about motorcycles and suspension. Here's another one, gives a few reasons why they're seen on commuter bikes and not race bikes. Page 3 on your link is pretty comprehensive though. T-Bob 1 Link to comment Share on other sites More sharing options...
T-Bob Posted November 28, 2017 Share Such as these?https://www.vitalmtb.com/news/news/Introducing-Race-Only-Springs,1088 Perhaps its too costly to produce dual rate spings? I don't know.Good question. Yeah... something much like that! Link to comment Share on other sites More sharing options...
T-Bob Posted November 28, 2017 Share maybe the answer lies in why motorcycles use dual rate springs more (albeit not exclusively). I don't think the answer is simple, and a reductive reason might just confuse the issue more. this looks like a good place to read up about motorcycles and suspension. Good call and nice find. Looks like I've got some reading to go through. It'd be fun to check out if they can nail the cost and precision of them. Capricorn 1 Link to comment Share on other sites More sharing options...
T-Bob Posted November 29, 2017 Share Just got this from the guys @ Race Only Springs. Seems interesting. "Thanks for getting in touch, it's the growing issue now that the air shocks have been supplied to the mass majority of short travel bikes. And for the most part people are now realising the weight penalty for running a coil shock is negligible when compared to the performance and comfort of coil. We are ironically finding out this Friday if we've secured funding for the next round of products, which includes dual rate rear springs for Downhill, Enduro and short travel trail bikes. Very much the exact thought process you're on with having the support deep in the travel from the air shock, but not having the initial suppleness and chatter eating ability of a coil shock. So as of right now we don't have them, but we have designs on the go with our manufacturer and are hoping to find out Friday if we can get them out sooner rather than later! It will be great to be able to offer them and turn trail bikes into very capable all round bikes. I can keep you updated as things happen if you like? Otherwise there's no one offering a progressive or dual rate spring as of right now, they are badly needed though.. Only thing I can recommend is seeing if there's any suspension tuners in your area who might be able to reshim the shock, or fit a larger bump stop. Not ideal fixes but I know exactly what you're looking for as I myself want to have a trail bike that can do all of the above. Sorry we haven't got a solution yet but it's almost here! Best regards, Seanad." Link to comment Share on other sites More sharing options...
BaGearA Posted June 19, 2019 Share any update on this ? Link to comment Share on other sites More sharing options...
DieselnDust Posted June 19, 2019 Share I made a few of these types of springs for a project at Uni. They can work but getting them to last as long as a mountain biker desires especially for the cost was a major issue and Capewell springs at the time scratched their heads and decided to give it a bash. The springs worked for about 30hrs then they started to lose their rate. The vehicle would sag to one side in the workshop. We eventually fitted Quadbike spring damper units as they are/were adjustable Technology has moved on since the 90's so perhaps the problems have been worked out but Euro 230 /spring.....yirre thats a new Fox rear DV in performance Link to comment Share on other sites More sharing options...
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