Filed In: Process

New Project - An Adjustable Bicycle

June 29, 2020   |   Chris Blandford

Before I explain the Why, I’ll explain the What. (Nerdy bicycle stuff here--I apologize.) This is the second piece to a puzzle I’m slowly putting together. I’m building an adjustable geometry bicycle. I posted photos of the stem to Instagram few weeks ago, and the fork was next on the to-do list.

You’d think an adjustable rake fork would be easy enough to make. I wanted to accommodate variable headtube angles, however, and so... well... things got a little weird. The fork can be adjusted for use with a frame that has a 65-75 degree head angle. The rake is adjustable from ~20mm to ~90mm (rake is measured perpendicular to the steering axis, so the exact range varies with the head angle). The porteur-style rack was also made to pivot, so as to remain level regardless of head angle. The rack angle and the head angle can only adjust together (not independently), which locks the whole thing down nicely when torqued into place. No front brake. I’m trying to avoid a… umm... cat’s curiosity situation here... and thought braking forces on a sliding front wheel was probably not a great idea. I’m also planning on experimenting with multiple wheel sizes on this bike. It’ll clear up to a 700C x 43mm tire.

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Filed In: Process

Father/Daughter Project - Conclusion

April 24, 2020   |   Chris Blandford

Took photos of both bikes on Monday:

And that's that! Mathilda needs another inch or two before she'll be able to flat foot her bike and give pedaling a go. It's just... a bit... too... tippy-toes at the moment. Give her a few days.

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Filed In: Process

Father/Daughter Project - Part 21

April 17, 2020   |   Chris Blandford

Here’s how I finished the adult-sized bike.

I’ve received quite a few emails about this finish… Keep in mind, this bike is going to see very few, sunshine-only miles per week. I’m not worried at all about durability or rust. I wanted something that looked ok and that I could remove/touch up easily down the road.

After looking into it, I learned that there are a few ways to do this. As I understand it, the professional version is something like a true black oxide coating plus a wet clear coat. What I went with was:

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