About us

The DirtySixer® bikes brand started by accident. Literally. Being 6'6" (or 198cm) I was riding a regular bicycle (with 700c or 29er wheels) that was made as an afterthought for tall riders. It was unstable and flimsy. I crashed and broke several bones. So while I was healing in a cast, I learned how to design and later fabricate a better, bigger, safer bicycle that would have big proportionate 36-inch wheels and would be good looking. The DirtySixer® was born, growing a community of tall brothers riding unique big wheel DirtySixer® bikes. If you’re tall or really tall, there’s a good chance you’ve never had a bicycle your size and ever experienced the joy of riding in comfortably and safely. Until now. Many pro athletes have chosen the DirtySixer® bikes to ride, among Shaquille O’Neal, Mark Eaton, Rudy Gobert etc. My goal is to make this big wheel experience accessible now to more people, so they can, too, feel like a kid again.

David Folch, CEO and Founder


2011: Broken ankle and start learning bike design and engineering
2012: Start working with local californian fabricators to make a prototype
2013: Official launch of DirtySixer® bikes at the Sea Otter MTB festival with the first proto, meet Bill Walton and start perternship with NBRPA
2014: NBA All Star in New Orleans, meet Coach Dale Brown LSU, fabricate 2 more prototypes
2015: NBA All Star in NYC, delivers Shaquille O'Neal with his custom DirtySixer®
2016: Successful 1st crowdfunding campaign, NBRPA in Las Vegas, delivers Kevin Durant, Shaq's ride a DirtySixer® in Amex national ad campaign on TNT
2017: Make a proto DirtySixer® electric assist, another successful crowdfunding campaign, delivers Mark Eaton, Rudy Gobert, Rik Smits, exhibit at Eurobike show in Germany, Bayern Munich, Brose Bamberg and Alba Berlin basketball teams test ride the DirtySixer®
2018: Partnership with NBPA for their VIP members, attend NBA summer league in Las Vegas, delivers 2nd DIrtySixer® bike to Shaquille O'Neal, Dallas Mavericks, Philadelphia 76ers teams test ride the DirtySixer®
2019: Delivers entire DirtySixer® bike fleet to Utah Jazz team members, prototyping new line and electric models in Taiwan, delivers Lebron James, San Anotnio Spurs teams test ride the DirtySixer®
2020: Delivers Jonas Jerebko in Sweden with his MTB DirtySixer®, demand soars, inventory depleted (!)
2021: Launch of the new line!

2024: Launch of eDirtySixer Bosch. 32" and 36"