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Singletracks Mountain Bike Podcast

He had a hard time finding bikes that fit, so he designed one with 36-inch wheels

Singletracks Mountain Bike Podcast

Singletracks.com

Sports, Wilderness

4.7574 Ratings

🗓️ 25 March 2025

⏱️ 49 minutes

🧾️ Download transcript

Summary

David Folch is the founder and CEO of Dirty Sixer, a boutique bike builder focused on fitting tall riders with big wheel bikes. The Dirty Sixer line currently features gravel, all-road, and electric bikes, and will soon include a mountain bike with 32" wheels.

  • How did your brand Dirty Sixer get started?
  • How tall do you have to be for a 32er to make sense?
  • What are some of the MTB geometry challenges involved in designing around 32" wheels? Does anything get easier in terms of fitting tall riders thanks to the bigger wheels?
  • Has tire availability limited the development of 32" wheel bikes up until this point?
  • Are any current MTB forks designed to fit 32" wheels?
  • You hinted that you're working on a full-suspension mountain bike with 32" wheels. What are the challenges involved in designing a bike like that?
  • Will a 36er mountain bike ever be viable in terms of tire and fork availability? 
  • There are several comments on your Instagram posts from people who are against the idea of a mountain bike with 32" wheels, seemingly because this would represent another standard. Do you think 32" wheels will ever gain significant traction like 29er wheels did in the early 2000s?
  • What's next for you in terms of big wheel mountain bike development?

Visit dirtysixer.com to get more info about the bikes and tech discussed in this episode.

--Keep up with the latest in mountain biking at Singletracks.com and on Instagram @singletracks

Transcript

Click on a timestamp to play from that location

0:00.0

Hey everybody, welcome to the single tracks podcast.

0:03.0

My name is Jeff, and today my guest is David Folk.

0:07.4

David is the founder and CEO of Dirty Sixer, a boutique bike builder focused on fitting tall riders with big wheel bikes.

0:16.0

The Dirty Sixer line currently features gravel, all road, and electric bikes, and will soon include a mountain

0:22.7

bike with 32-inch wheels. Thanks for joining me, David. Hi, Jeff. Thank you for having me on your show.

0:29.3

So tell us, how did your brand Dirty Sixer get started? That's a good start, indeed, because, you know, being 6'6 myself, almost two meters, I was

0:41.0

riding regular bikes, 64, 66 road bikes, never found any double XL back in the days.

0:49.0

So I was riding those kind of unstable bikes, and I crashed, broke my ankle in two parts and at that point

0:58.0

I was like okay let's let's make something that is going to be actually the right size for us

1:04.8

tall I mean for us first of all I sought to make a bike for myself.

1:20.3

So necessity being the mother of invention, I was faced to, you know, designing something bigger, proportionate.

1:23.0

And I discovered that there were bigger wheels.

1:25.9

They were used for unicycles.

1:30.3

And I was having a background of a photographer. You know, I often use this analogy of the Photoshop tool to expand the picture.

1:37.6

So if you expand the picture proportionally, so when you get the taller rider, you should get bigger wheels.

1:45.8

So everything being in proportions.

1:48.4

So that's how I got started, trying to design a bigger bike with back in the day 36-inch wheels.

1:55.4

That's the biggest wheel.

1:57.7

Yeah, those were huge.

1:59.2

Yeah, they are.

2:01.0

And they've been around for a while, actually.

2:03.8

So the history of 36 is not totally clear to me yet, but I think it's more than 25 years now that the 36 inch wheel was created.

...

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