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1986 Bridgestone 400 Conversion with disc brake

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1986 (?) Bridgestone 400 Sport Touring

Stock road drops with stock stem OR Nitto flat bars and Nitto Jaguar

Modified Bridgstone stock fork to allow for disc brakes and Campy Record headset

Halo Spin Doctor hubs, DT Swiss RR 1.2 rims, DT Swiss Super Comp spokes, and alloy nipples (identical to rear)

Halo Spin Doctor hubs, DT Swiss RR 1.2 rims, DT Swiss Super Comp spokes, and alloy nipples (identical to front)

Stronglight 105 cranks with a 46T chainring and an unknown BB

Soma Kamisori Saddle and stock seatpost

Crank Brothers Egg Beaters and Shimano CN-HG91 Chain

Tomi Cog 17T/46:17 gearing

I would have done my commuting on one of my mountain bikes, but they are heavy, slow, and expensive (tires and bike replacement cost) to commute to work on effectively. I needed something simple, relatively cheap (compared to my other bikes), and easier to pedal than my current bikes. That pretty much describes a SS road bike, but as an additional bonus, I wanted a fixed gear to teach me to continue to pedal even when it hurts. I figured it would help my endurance for mountain biking.

My dad caught wind of my plan to buy a fixed road bike and gave me his old 1986(?) Bridgestone 400 Sport Touring bike to convert. The frame is nothing special; just 4130 straight gauge and the components were bottom of the line, but it was enough for my needs.

The 27" low end, heavy wheels had to go in favor of something lightweight and strong. In my quest for wheels I came across Tomi Cog and London Fixies (through, actually). Since my background is with mountain bikes, not road bikes, I knew what's good and bad for mountain bike components, but had a lot of difficulty differentiating between actual quality and trend in the road bike/fixed gear world. So I chose to go with a mountain bike disc hub instead of something built for road use.

Since I was going need axle adapters made for the rear, I tossed around the idea of running the same hub in the front. Why not, right? I've never heard of a wheelset where both the front and rear wheels are completely identical. It makes sourcing, replacing, and maintaining parts super simple since a given spare part will work for the front and rear interchangeably. Since both the F&R would have the IS disc holes, I also tossed around the idea of running a mountain bike disc brake. I've never seen it done before and thought I'd take advantage of a disc brake's modulation abilities, wet braking abilities, independence of the trueness of the rim, ability to be used on one of my other bikes in case the concept sucked, and, I'll be honest, the uniqueness factor.

Walt Works out of Boulder, CO made that idea possible by welding the disc tab to the fork. Then, Redstone Cyclery of Lyons, CO built the strange wheel set to my spec with the DJ hubs. My good friend, who's a machinist in Colorado Springs, made the custom axle adapters and gave them the ability to be run in 100, 120, or 126mm dropouts. I painted the frame Nissan 350Z - La Mans Sunset and it turned out pretty dang good for my first paint job. There's a few great tutorials over on Bike Forums about the correct way to paint a bike.

And that's it. I now have a commuter that's comfortable to ride, not too hard on the eyes, and sits patiently at the cube next to me until the ride home.

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sweet crankset! i want one of those!

Slap in the face?

Hah! Its like, ironic or something... having that giant complicated mess of a brake (extra wheel, braze-ons, pneumatics, god-forbid a brake lever, etc) is a beautiful contrast to the concept of the Fixie Lifestyle.

Beautiful in idea and execution. (Way to resource all the mods!)

god forbid a break lever?

god forbid a break lever? pshaw

hot shots to prostitutes

This is the future of RADICAL endo's! I love this bike


im a sucker for disk brakes.


That's pretty friggen' cool!

Pretty darn cool

Innovative and interesting! How do you like the Tomi Cog? I've been eyeing them for my Karate Monkey.

In my opinion, the Tomi Cog

In my opinion, the Tomi Cog and London Fixies cog are the next generation of fixed cogs. The Tomi Cog isn't pretty and shiny like a high-end threaded cog, but it is functional, burly, and simple. I don't have to worry about threads stripping or lock rings coming loose. I just have to check my cog bolts once in awhile. Worth the money, IMO.

Here's a picture of the chainline. The cog is barely too far in, but it's pretty close to perfect.

Not to mention...

That you don't need to carry more than your standard multi-tool if you have cog issues on the road. Your chainline is closer than a lot of bikes I see..ahem. I did see that the London Fixie Cog people make a one piece six hole spacer that would do the trick, and probably alleviate slippage that could happen with individual aluminum ones.
Shiny cogs aren't shiny for long anyway!

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