The Rotary single features a female system in this hub. The steel thru-axle with nuts was replaced with a lighter and stronger oversized AL7075-T6 axle and steel bolts. The female axle system will immobilize the wheel in the dropouts no matter what, and there is much less chance to hurt your ankles on the bolts.
Overall, we managed to produce an strong hub in an economical price range. The Rotary is a real street/dirt mountain bike disc brake single speed hub (135/10) using pure BMX technology. Instead of a long and weak 3/8" axle we used a bigger diameter AL7075-T6 axle & steel hardware on the drive side to make it almost indestructible. No external threads to damage. 3/8" bolts with 17mm hex heads & 6mm Allen hex sockets will fully immobilize your wheel in the dropouts. The driver runs on 2 big sealed bearings. It's strong as hell and run smooth.
Specs
Material: AL6061-T6 body, AL7075-T6 axle and cones, steel bolts
O.L.D: 135mm
Compatible with: all MTB frames (O.L.D 135 x 10mm or 3/8")
Axle: hollow AL7075-T6 axle, female oversize axle system + side bolts this solution rules as it's light & strong!
Bearings: 4 x #6902 sealed bearings (2x main hub bearings, 2x inside driver)
Bolts: 17mm hex head and 8mm Allen hex sockets, 3/8"x24tpi thread
Driver: 10T driver with two decent sized, strong sealed bearings
Pawls: 3 pawls with 30 engagement points / each 12°
Disc brake: disc brake mount IS (International Standard / 6-bolts)
Available: in 32h version only
Weight: ~440 grams
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Specs
Size
Metric
Imperial
This is a size chart.
Geo
Metric
Imperial
Geometry of this bike.
Reach
Horizontal measurement taken from the middle of the bottom backet to the middle of the headtube.
Stack
Vertical measurement taken from the middle of the bottom bracket to the middle of the headtube.
Effective Top Tube
Horizontal measurement taken from the middle of the seatube to the middle of the headtube.
Actual Top Tube
True length of the top tube taken from the seatube along the toptup to the headtube.
Standover Height
Vertical measurement taken from the ground to the the middle of toptube.
Seat Tube Angle
Angle of the seatube.
Seat Tube Length
Lenght of the seat tube taken from the bottom bracket to the top of the seat tube (the measure is taken alongside the seat tube)
Headtube Angle
Angle of the headtube.
Headtube
Vertical lenght of the headtube.
Chainstay
Horizontal measurement taken from rear axle to the bottom bracket.
Wheelbase
Horizontal measurement between the two wheel axles.
BB Height
Vertical measurement taken from the ground to the bottom bracket (Never taken at sag).
BB Drop
Vertical measurement between the height of the axles and the height of the bottom bracket.
