“Wanted to try the 650B wheel size in a 1×10 gear combo with a fillet brazed frame, all a first for me. I’m waiting on the Minnesota thaw to ride it. Looks like it will eat our smooth rolling single track. I loved my two weeks in Ashland building my first bike frame. Cheers!”
The frame is a fillet-brazed 650b steel hardtail. My goal was to create a frame with 650b-specific geometry that fit me well. I love the way it rides! It has a slack head angle, but the short chainstays and wheelbase keep it very flickable.
Some geometry specs:
69 degree head angle
72 degree seat angle
12″ bottom bracket height with 100mm Fox fork and no rider
I couldn’t be more happy with the frame I built at UBI. I hope to build many more.
Here is the finished product (650B with Paragon stainless sliding dropouts). The finished filing without a vise was a bear, but everything cleaned up really nice. The paint was done by Class Act Powder here in Portland. As for the ride, it is very responsive and loves to climb hills, basically everything I could ask for. The total weight is 26 lbs. 4 oz. with suspension fork and pedals. I definitely learned a ton about both design and technique, which I will take forward with my next build. A big thanks to Ron and Gary.
Built in Jim Kish’s Ti class. A mix of trail / jump bike and a whole lot of fun. Can’t thank UBI, Jim and Gary enough for the awesome class and the amount of knowledge gained from it.