Nakano Air Hubs

Nakano Air Pump Hubs on this page: 36-hole front | 36-hole x 130mm rear

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Nakano Air Hubs are a wonderful invention. The hub acts as a small air pump. A tube from the hub to the tube valve stem keeps the tire continuously inflated to 95 PSI.

Here's the explanation from the Nakano Iron Works in Japan:

Being a specialist of bicycle hubs, we have been always monitoring the customer's opinions and noticed that the most important factor that the cyclists are worried about is a flat tire. We have come to know through our investigation that most of the cyclists ride a bike with tires of air pressure at 1.8atm in average in spite of the required 3.0atm.

Less air pressure causes a flat tire, but leakage of the air is inevitable as long as rubber is used inside the tire. An idea to keep pumping the air while riding a bike has flashed into my mind and it seems better to make such a mechanism rather than waiting for a rubber maker to produce leakless tubes.

After spending a lot of time, we have finally developed a hub continuously supplying the tire with the air while cycling.

Nakano Air Hub