PVD Magic Ring

Inspired by products designed and made by Magic Motorcycle in the early nineties. Some wild stuff. Probably not the best, but intriguing to say the least. Especially if you are a machinist type like me. So, 2×10 has taken hold in mountain biking. It has a place but certainly 3×10 does as well. Shimano has … Read morePVD Magic Ring

Cool Radar Mount

This is a neat project from work. It’s a straddle mount that will sit on top of a wall above the water treatment facility on Ocean Beach. It will support a 9′ rotating radar boom against anything the Pacific Ocean can throw at it. 0.375″ stainless steel, plasma cut and welded together.

Mercury.

Named for the NASA Mercury space program. Seriously rad! The 2011 PVD Mercury Trailbike. Tapered head tube, 2×10 designed, DMFD, ISCG05 w/slider, BB92, with clearance for 3.0″ tires. Like all PVD Trailbikes, this bike is designed specifically to completely dominate Marin California singletrack. The time tested and challenged design sets the standard for high speed … Read moreMercury.

fiftyfifty

Math and numbers rule! You can learn a lot from them. This weekend I put my nose to the grindstone and measured the weights for my bike and weight distribution. Bike weight (full of fuel) – 444.5 lbs. Ride weight (no gear) – 203 lbs. Gear weight – 18 lbs. Weight distribution – 49F/51R (note … Read morefiftyfifty

You don’t know anything unless you’ve measured it.

You don’t know anything unless you’ve measured it. A very wise tuner passed that statemet down to me. I learned a lot from him. Dan Kyle. Look him up. People get pretty spooked about suspension. They get lost. They get confused. I used to. Then I bought a spring scale and everything made much more … Read moreYou don’t know anything unless you’ve measured it.

Countries that suck!

#1 on my list is, of course, England. Top reason: BSC (60°) thread, special case, 13/32″ x 26 tpi. Let’s just call this the Sturmey-Archer thread from hell. It’s doesn’t conform to SAE, ISO, JIS, DIN or any other modern standard. It’s not even Whitworth (55°), which you might imagine. It’s a special case, used only by … Read moreCountries that suck!