EVO6 frame standard
The evolution of the wheel world
As with the Boost standard, we have widened the hub dimensions from
142 mm to 148 mm. The EVO6 standard, however, is a further
evolution of the Boost standard since we were able to not only
increase the stiffness of the rear wheel, but also improve the
chain line.
Comparison between 142 mm, 148 mm Boost and 148 mm Evo6 hubs
(1) 142 mm hub
The rim is not aligned centrally between the two hub flanges (62%/38%). This results in highly unequal spoke tensions between the spokes of the drive side and the non-drive side.
(2) 148 mm Boost hub
The hub is widened on both sides by 3 mm each, yet there is no positive effect on the spoke tension as the ratio of 62% to 38% remains the same.
(3) 148 mm EVO6 hub
The hub is widened by 6 mm only on the drive-side. The hub flange of the non-drive side moves towards the center of the hub slightly, the hub flange of the drive side is moved outwards significantly. The result is an almost symmetrical and thus noticeably stiffer and more durabel rear wheel.
With the bigger rear hub standard, the insert dimensions of the rear frame need to be worked on, too. This is where the difference between Boost and EVO6 come into play. Rather than simultaneously widening the rear frame by 3 mm on both sides, the EVO6 frame standard has the drive side chain stay and seat tube stay move towards the outside by 6 mm. The rear frame is asymmetrical, which allows us to build a wheel with the superior advantages stated above.
The rim is not aligned centrally between the two hub flanges (62%/38%). This results in highly unequal spoke tensions between the spokes of the drive side and the non-drive side.
(2) 148 mm Boost hub
The hub is widened on both sides by 3 mm each, yet there is no positive effect on the spoke tension as the ratio of 62% to 38% remains the same.
(3) 148 mm EVO6 hub
The hub is widened by 6 mm only on the drive-side. The hub flange of the non-drive side moves towards the center of the hub slightly, the hub flange of the drive side is moved outwards significantly. The result is an almost symmetrical and thus noticeably stiffer and more durabel rear wheel.
With the bigger rear hub standard, the insert dimensions of the rear frame need to be worked on, too. This is where the difference between Boost and EVO6 come into play. Rather than simultaneously widening the rear frame by 3 mm on both sides, the EVO6 frame standard has the drive side chain stay and seat tube stay move towards the outside by 6 mm. The rear frame is asymmetrical, which allows us to build a wheel with the superior advantages stated above.
The chain line
With the cassette (1) being moved outwards with the EVO6 standard
by 6 mm, the chain line (2) is altered also. The chain ring is
moved outwards by 3 mm, the Q-factor (3), however, remains the
same. With the 3 mm offset, the chain is bent less running on the
smaller sprockets leading to a better chain guidance, less
friction, and thus less chain wear.
EVO6 advantages
With the off-center spoke pattern of EVO6 rear wheels, we were able
to build our wheels with similar length spokes for both the drive
and the non-drive side. As the spokes therefore also feature the
same spoke angle, the spoke tensions is identical for every single
spoke with the forces inside the wheel being delivered and spread
out evenly. Tension peaks stressing single spokes extraordinarily
can be avoided this way leaving the entire wheel being a lot more
stable than commonly built wheels.
Syntace EVO6 wheels compared to common 142 mm standard wheels
Axle standard: EVO6
Axle standard: 142 mm
Axle standard: EVO6
- Spoke tension drive side: 90 kgf
- Spoke tension non-drive side: 90 kgf
Axle standard: 142 mm
- Spoke tension drive side: 110 kgf
- Spoke tension non-drive side: 70-80 kgf