Pikey Posted July 21, 2015 Posted July 21, 2015 My tetchy knowledge is not very good at all . But have had 2 cannondale triggers with almost identical builds one with a lefty and one with a fox 34..... Currently have the fox version . There is a particular rocky section at my local trail park that is very steep and a gut busting climb. Have ridden many a bike up there and only get 2/3 thirds of the way everytime,except when I had the trigger with the lefty. Made it up There twice as it just tracked and didn't wander in the rocks. All I know is I want another lefty,I even preferred it to the pike.
PeterF Posted July 21, 2015 Posted July 21, 2015 The Lefty is an extremely stiff fork and very light as well. The pre 2013 Lefty's required a lot of maintenance but the new hybrid Lefty's are apparently much better.
raptor-22 Posted July 21, 2015 Posted July 21, 2015 But that's assuming that the one is simply supported while the other is not? But even so, looking at the rotational displacement (say, a lateral force is applied to the wheel), a "cantilevered" wheel with a stiffer, half-length 20mm axle will almost have twice the rotational displacement than a "simply supported" normal-length 15mm axle. And that's assuming that the axles are solid.The lefty is a cantilever with load at the Wall and on the end. A conventional axle is a simply supported beam with loads inboard of the support. What do you mean by rotational displacement?
Fisan Posted July 21, 2015 Posted July 21, 2015 The lefty is a cantilever with load at the Wall and on the end. A conventional axle is a simply supported beam with loads inboard of the support.I'll accept that. Truth be told, I've never seen a lefty wheel removed... What do you mean by rotational displacement?It's just plain rotation around the forward axis or the rotation causing the wheel to flex towards (or away from the stanchion).
raptor-22 Posted July 21, 2015 Posted July 21, 2015 You refer to precession or gyroscopic forces? Those loads won't really worry the axle much. Add those loads to the centripetal forces of the rider bike combo with the wheel traction as a supportive force and we're in business where the 20mm cantilever will demonstrate its loading carrying capacity over a 15mm simply supported beam. Its still a small contribution to the overall stiffness that the square tube delivers in resisting the torque of the opposing forces of the rider twisting the bars one way while the centripetal and gyroscopic forces are trying to twist it the other way.
Fisan Posted July 21, 2015 Posted July 21, 2015 You refer to precession or gyroscopic forces? Those loads won't really worry the axle much. Add those loads to the centripetal forces of the rider bike combo with the wheel traction as a supportive force and we're in business where the 20mm cantilever will demonstrate its loading carrying capacity over a 15mm simply supported beam. Its still a small contribution to the overall stiffness that the square tube delivers in resisting the torque of the opposing forces of the rider twisting the bars one way while the centripetal and gyroscopic forces are trying to twist it the other way. I'm referring to the flex of the axle, due to the lateral flexing of the wheel...don't know how to put it explicitly in words, so herehttp://www.slowtwitch.com/articles/images/3/65643-largest_Mavic_Lateral.jpg A cantilevered beam will flex a lot more under such loading - even the stiffer 20mm. But would you say that this effect is minor compared to the other advantages gained? FIY, I'm not trying to disprove the overall advantages of the Lefty, I'm jus not sold on that axle...yet
f40pilot Posted July 23, 2015 Posted July 23, 2015 I was told the lefty fork was based on the landing gear of a F16? Anyone know if this is true?F-18 Hornet. It was an oleo-strut that didn't like the landings, so a four-sided needle-bearing leg was developed... See where this is going?
nickc Posted July 23, 2015 Posted July 23, 2015 F-18 Hornet. It was an oleo-strut that didn't like the landings, so a four-sided needle-bearing leg was developed... See where this is going? No wonder my Flash is so flipping fast given its heritage !!!!
raptor-22 Posted July 23, 2015 Posted July 23, 2015 F-18 Hornet. It was an oleo-strut that didn't like the landings, so a four-sided needle-bearing leg was developed... See where this is going? where did you find this story?
raptor-22 Posted July 23, 2015 Posted July 23, 2015 No wonder my Flash is so flipping fast given its heritage !!!! That story is not true. but it does make a nice story
Dorpie Posted July 24, 2015 Posted July 24, 2015 Lefty has to be the best fork I've even ridden. The instant response is amazing and the fact that there is no flex just makes for better handling.I've got a Flash 29er with the PBR Lefty and I've been able to do some extreme riding from the normal XC to enduro with all the confidence in the world, I would love to see how a Lefty MAX handles on the Trigger.
koukie Posted July 24, 2015 Posted July 24, 2015 I'm currently on a RS SID top of the range one, and I would love to go back to my lefty. It felt much smoother and stiffer.
PhilipV Posted July 24, 2015 Posted July 24, 2015 I have yet to see someone who spent a lot of time on a lefty, diss a lefty. The older lefty loved a bit of maintenance, but then so does Fox and RS nowadays. It just looks and feels weird in the beginning when you only see one stanchion, but that blows over quickly. I would love to ride a lefty again. I have Fox and a couple of RS, and they all work great, but the Lefty is amazing. Yes it is that good!
kingalton Posted July 24, 2015 Posted July 24, 2015 2015/07/24, 02:32 The @RideCannondale Trigger Carbon 2 survives the challenging Sandy Ridge Trail System hntd.ch/1KmsDkm pic.twitter.com/bir4oMDIDP
raptor-22 Posted July 24, 2015 Posted July 24, 2015 And Lefty is now available in 160mm travel for enduro racers
kingalton Posted July 24, 2015 Posted July 24, 2015 I have had 2 lefties, one on my flash 29er (old version) and on my current Scalpel (new version)I still rate the previous version more, much more plush than the new one, the new one is stiffer, but the old one just feels smoother.. still a super "fork" the new one though..Don't think I will go for another type of fork.. Lefty just works so well
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