More about CCPROTO
The mountain bike had a beginning, a brief time when it was defined and given birth. The first builders made their frames with steel tubing and used angles and dimensions borrowed from classic paperboy bikes. Factory made mountain bike components didn’t exist. The earliest bikes were completed with parts made for touring and cyclocross bikes, even motorcycles.
I was riding Marin’s single-track trails on my modified skinny tire bike with dropbars and toe clips as mountain bike culture was taking root in Marin County. Occasionally I encountered early mountain bikers on my rides. Their bikes were interesting, but they were too ponderous and heavy for the trail riding I enjoyed.
Everything changed when the Snakebelly tire, the first lightweight fat tire, and the first wide aluminum rim made by Ukai became available. Now it was possible to build an awesome mountain bike! I started building CCPROTO in 1978, designing every part from the ground up for minimum weight and maximum performance.
It had dropbars and toe clips because I felt they use the human engine more efficiently. I built the frame shorter than convention, with steeper angles for agile handling, and the lower bottom bracket improved stability. The powerful brakes were made specifically to handle the huge traction offered by the new tires. The light fork, with its tubular crown and internally butted blades had excellent shock absorbing qualities. Titanium and magnesium were used in some of the specially made parts.
Before finalizing the bike in 1979, I cut and re-welded the frame tubes several times, adjusting angles and dimensions to perfect its handling. The final version, displayed here, excelled on the mountainous single-track trails in my backyard. In 1980 I took the bike with me to Crested Butte, Colorado and developed friendships with the local riders as we did their favorite epic rides. The visit was capped off with the Pearl Pass Tour. Several of my new friends were so impressed with my bike’s performance that they insisted that I make bikes for them. This launched my bike building business, which extended to 1993, resulting in 178 framesets.
CCPROTO was advanced for its time. Many of its features were adopted in the bikes that followed and its influence can be seen in today’s mountain bike.
Bike weight 23.5 lbs
Frame material 6061 aluminum tubing
136mm rear drop out spacing for optimal chainline
Unique dropout design for stronger derailler hanger. Slot angle allows wheel retention with minimal quill pressure.
Tubular 4130 crown with butted, thinwall 4130 blades
TIG welded and nickel silvered joints
115mm dropout spacing for extra spoke bracing and shock absorption in wheel
Machined ZK60A magnesium, hollow core with removable cap, pressed and riveted 4130 quill tube
Chainstay mounted for maximum rigidity and precision modulation
Adjustable Toggle Linkage, anodized 7075-T6 aluminum arms
HiE flanges with extra wide spacing and zero spoke dish for wheel durability
Lightweight stainless quills with aluminum nuts
Seatpost 2024-T3 aluminum tubing, magnesium saddle clamp, pump stored inside
Seatpost Clamp Prototype cam action, anodized 7075-T6 aluminum
Chain Guide Anodized 7075-T6 aluminum with 6-4 titanium chain tunnel
Rear Derailleur Shimano Dura Ace road derailleur for faster, more accurate shifting
Made to work with the wide range freewheel by modifying the mounting pivot and using an external spring.
Freewheel 13-34 five speed Suntour with custom ratios
Pedals: MKS with smooth platform added and modified toeclips for efficient power transfer with easy foot entry and exit.
Toe Flips 6-4 titanium
Handlebars Cinelli with modified bend