GOKISO Hub
for PIST / TRACK

Characteristics
The "GOKISO Hub for PIST/ TRACK" was developed to utilize advantages that the former GOKISO hub has in track race.
Improving the strength of the axle greatly, it does not degrade the original performance of the bearing against weight and centrifugal force during the competition.
GOKISO hub with strong flanges made by A7075-T73 is able to react without the loss of power even in tough situations.
You will be able to experience the rolling smoothness even in the arena.
This is the hub for athletes.
The "Jet-engine-inspired" GOKISO elastic suspension.
Ball bearings in a bike hub must be big enough to support its load, thus, larger its diameter, the bearing balls suffer more friction and heat generation. As a result, it degrades the rotation performance. The GOKISO Hub use of 2mm-diameter"micro steel balls"made of the highest quality material used for precision machines is certainly unique. The roundness accuracy of the "Micro steel balls"is well illustrated by this is if the ball was the size of the moon, the surface roughness of the ball would be as little as 70m.
The world's first "Double-bearing" structure.
Ball bearings in a bike hub must be big enough to support its load, thus, larger its diameter, the bearing balls suffer more friction and heat generation. As a result, it degrades the rotation performance. The GOKISO Hub use of 2mm-diameter "micro steel balls" made of the highest quality material used for precision machines is certainly unique. The roundness accuracy of the "Micro steel balls" is well illustrated by this is if the ball was the size of the moon, the surface roughness of the ball would be as little as 70m.


GOKISO’s shock absorbing and elastic body suspension is the ultimate solution to axle deformation.
Cobblestones bike racings are popular bicycle tours in Europe. When racing on such a rough street, a hub must bear a deadly impact (approx. 600kg weight) in every moment. With a standard hub structure, a shaft easily gets deformed and axle becomes deflected causing bearings to twist.This creates a constant "put on brake" condition on the bearing, caused by abraded steel bearing balls . As a result, more pedaling force is required. GOKISO Hub adopts a spring-structured and elastic body suspension around the bearings with a 0.5mm play to absorb the shock. This system minimizes the shock without sacrificing its rotation performance.
Spherical nut and washer
A hub shaft could get deformed during wheel installation when clamping the wheel to the folk or the frame using a quick lever.
Our spherical nut and washer are the successful solution for these problems. By keeping the hub shaft straight regardless of frame deformation, we have achieved the highest rotation accuracy without abrading or damaging the bearing.
P5 grade (DIN) high precision bearing, made in Japan.
GOKISO Hub has two bearings each side ("double bearing system") whereas a standard hub has a single bearing on both sides of the shaft. In addition to the four bearings in the front, we have added extra bearings to the rear unit drive; totaling seven bearings. This new structure improves durability against static load and minimizes the bearing vibration.
Specification
GOKISO Hub for PIST/ TRACK
  Front hub Rear hub
O.L.D. 100mm 120mm
Spoke H 20H 24H
Center to flange * 25.8mm / 25.8mm 23.8mm / 23.8mm
P.C.D. * φ62mm / φ62mm φ62mm / φ62mm
* mm / mm = left / right
Recommended Spoke SAPIM CX-RAY
Bearing type Non-contact sealed deep groove bearing (DIN P5)
Bearing Qty 4 pcs 4 pcs
Ratchet - Fixed
Weight 380g 330g
Material A7075T73