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If you would like a very, actually easy rear suspension, look no additional than the Veli, a brand new mountain bike showcasing Vasttech’s Suspension System. Utilizing two outsized pivots about midway again on the chainstays, they ship a brief arc of rear wheel journey with out the complexity of concentric pivot-and-bottom-bracket designs.
They are saying the design supplies optimum chain progress in the course of the a part of journey the place you’re possible pedaling, then minimizes it deeper within the journey while you’re possible descending tough terrain and don’t need any pedal kickback.
OK, however what’s “optimum chain progress”? It’s mainly anti-squat, and when the bike is sagged and sitting in 20-35% of its journey, they are saying it has 38.7% extra chain progress and associated anti-squat than a comparable linkage pushed single-pivot design.
In different phrases, it signifies that your pedaling forces are pulling the chain, which is attempting to tug the rear axle downward into the bottom. This could maximize traction, however (my evaluation) additionally very more likely to scale back small bump compliance. So, traction first within the first third of journey.
After that, they are saying chain progress is minimal or non-existant.
One other profit is the angle of the axle path when it hits a bump. As a result of the axle sits beneath the principle pivot, it first strikes up and again, nearer to the route of influence as you roll ahead. They are saying that is much more environment friendly as a result of it’s not attempting to soak up a horizontal influence in a purely vertical trend.
The opposite claimed profit is decreased unsprung mass. The extra “stuff” there’s between the axle and the shock, the extra inertia there’s earlier than issues get shifting, slowing down a suspension’s response to inputs. Lowering that mass lets it react faster, enhancing small bump compliance particularly.
Whereas the bike is new, it’s value noting that the suspension demo movies on Vasttech’s web site had been uploaded 4 years in the past. Geo chart above, and different pertinent specs are 116mm rear journey with 120mm forks, exterior routing for every little thing, and low leverage ratio (.2:1) lengthy stroke shocks for low stress efficiency.
Extra tech specs at Veli.bike and Vasstech.design.
