Myotragus will soon release its debut framesets; the Dorothea 17 and Dorothea 20 with almost straight-line 100% rearward axle paths
Myotragus, an emerging Mallorcan mountain bike brand named after an extinct mammal known only to have inhabited the Balearic Islands of Mallorca and Menorca, is very close to releasing its debut framesets; the Dorothea 20 DH Bike, and the Dorothea 17 Enduro Bike. Rather appropriately, the Myotragus Bikes are named after Dorothea Bate, the Welsh paleontologist who unearthed the creature in 1909.
At this point, with his ideas having not yet materialized beyond his own thoughts, Roger decided he needed the advice of an engineer who would be able to mathematically explain why the theoretical straight-line rearward axle path would offer performance advantages on the trail.
As the rear wheel is displaced, the lower link rotates anti-clockwise to drive shock compression, while the upper link pivots eccentrically about a very large bearing housed between the seat tube and the top tube. The upper pivot on the swingarm moves forward and up initially, and then down and rearward again as the shock is pushed deeper into compression. In this way, Joan and Roger were able to control the arc of the rear axle path such that it is very close to a straight-line.
The Dorothea’s axle path is really quite different to the rearward axle paths we’ve seen on other, more mainstream high-pivot bikes. These are more arced, such that the rear-center length grows more early on in the stroke, but begins to arc forward again toward bottom-out. A notable exception would be the. As the axle path is closer to that of a straight line, the Dorothea’s rear-center length grows more gradually, but the very shallow arc means that it never begins to track forward.
The above leverage curve pertains to the Dorothea 20 DH Bike. The 175mm travel Dorothea 17 Enduro Bike leverage curve will not be dissimilar in shape; Joan says the highly progressive initial stroke and end-stroke will be reduced to produce a curve with much less overall progression .
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