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Origin8 Uno Bicycle

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Origin8 53/54cm Uno fixed-gear bicycle. New, $550.00

Part# 94750

• Frame is 4130 double-butted chromoly steel, fork is aluminum alloy.
• Brakeset: Promax dual-pivot
• Hubs: KT alumunum
• Handlebar: Aluminum bullhorn
• Rear cog: 18-tooth
• The bike comes set up for 1/8" chain. Both the chainring and the rear fixed cog are 1/8".
• The rear hub is threaded on both sides with the flip side threaded for a freewheel.

We were asked how fat a tire this bike can accommodate. Here's what we learned:

• The front will not accommodate a beefy 32c tire like the Vittoria Randonneur. Perhaps someone offers a thinner 32c, or using a 30c. In any case, a normal 28c is about as big as one can expect to fit the forks well.
• The rear, using the length of chain on it, will accommodate a 32c easily, and by lengthening the chain and mounting the wheel further back in the track dropouts, will allow an even bigger tire.
• We posted a few pictures of our tire width accommodation testing at the bottom of this post. Or just click here.

Side view

Front view

From behind

Close-up of the head tube and top of the aluminum alloy fork.

Close-up of the crankset. Nicely finished.

The dual-sided rear hub with it freewheel (right side) and fixed gear.

The cockpit, showing the stem, tape and brake levers.

Testing the bike for tire width accommodation:

First, here's a Kenda 700 x 26:

Here's the 26c tire mounted in front.

Mounted in back, seen between the chainstays

Another shot of the 26c tire mounted in back.

Vittoria Randonneur 700 x 32:

Here's the 32c Vittoria tire mounted on the rear wheel.

Chainstay clearance

If the chain is lengthened, there is room in the dropout to move the wheel back and gain more clearance.

Like so. We cheated and simply removed the chain for this demonstration.

Resulting in sufficient clearance at the chainstays

And at the seatstays.

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For fun, here's a cartoon about learning to ride a fixed gear bike from 1895: