Foes fin-2

With the 29er wheel size reigning over all and the infectious enduroable 27.5″ wheel size all but swallowing up the existence of 26” wheels, how can someone not carry on the tradition of mixing up wheel sizes yet again? What are we going to call it? SevinFive9er… 79’er… 97’er?

Trip past the break and see what Brent Foes has been up to…..


Back in the mid-80’s, Cannondale made the SM500 & 600 with a 26” front wheel and a itty bitty 24” wheel in the back. The reasoning behind it was that the smaller rear wheel would be easier to spin up faster…. and well, it worked on motocross bikes. It never caught on since lugging the way too small rear wheel over anything significant was ineffective. 26 inch bikes had been fine for years, and during the time we were internet bashing each other over that crazy 29er wheel size, a few companies, including Trek made what most refer to as the 69’er for the same reason Cannondale did the 24/26’er bikes. Though it gained a little steam at first, the two wheel sizes were too far apart in size, and you could tell when rolling over things with both wheels.

What makes the Foes different is the fact that the 27.5 and 29er wheels are not that far apart from each other. So why do it? We did an extensive comparison a good while back which may back up why Foes is doing this. The 29er wheel size was developed because of their superior roll over. The 27.5’ers were originally a niche that didn’t take off…. that is until the demand for more travel and shorter chainstays gave 27.5 a new purpose. With All of Foes’ bikes being handmade domestically in Pasadena, CA, they don’t have to go too far out of the way to experiment with new ideas, and this is one that stuck.

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According to Brent Foes, you get the roll-over with the 29er up front and with the smaller 27.5 tucked up behind it gives the bike a livelier feel. What makes it different than the defunked 69’er is that it’s harder to feel the negative effects of the two different wheel sizes compared to the 69’er, given that the two wheel sizes are much closer together. Brent says the guys riding it love it and it has performed really well at some National Enduro races.

The Enduro Mixer will have adjustable suspension travel between 160 and 170mm and the head angle will come in between 66.5° and 77.5° with a 17.6” chainstay.

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The Trail Mix will have adjustable suspension travel between 130 and 140mm with a 67.5° and 68.5° head angles. Both bikes will come in medium, large and x-large.

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Foes is also now joining in on the fun of Plus size. Having been completed just days before Interbike, the Foes Apline Plus 27.5+ bike is sure to be a worthy addition to the current lineup. Foes built this 27.5+ bike to have an adjustable 5.5” to 6” of travel and though they’re still tweaking it, it is sure to be a fun ride.


  1. originalangrya on

    Go Mike V.! Great input to this fast rig and supporting those up and coming Foes riding racers! Timberline Cycles, Colorado Springs.

  2. Rob on

    “The Enduro Mixer will have adjustable suspension travel between 160 and 170mm and the head angle will come in between 66.5° and 77.5° with a 17.6” chainstay.”

    The latter may be a tad steep Trey 😉

  3. Awesome on

    I’ve got a MBA magazine from about 1992 I think where Brent Foes was at a trade show with a 6″ travel trail bike. It wasn’t right for the market then but his thinking was way ahead of the times. Brent Foes and Jeff Steber really led the way I reckon in developing long travel suspension bikes.

  4. Will on

    Ohhhhh foes…. Don’t you know doing something that isn’t certified by trek or speicialized will only led to the keyboard nah Sayers damning your product..

    In any case, I’ll take one of each…

  5. benzo on

    The absurdity of calling 650b 27.5 instead of 27 continues. The distance between 26 and 24 is exactly the same of the distance between 650b and 29: 2 inches.

    Having said that Liteville has been doing mix and matching 26-27 and 29 for years.

    • Fred on

      24in rims measure 20.5in, 26in rims measure 22in, 650b = 23in and 700c=24.4in. So while the difference between 20.5 and 22in is 1.5 which is about the same as 23 and 24.4in it is 1.5in NOT 2in!

  6. stratosrally on

    These particular combinations of 650B rear and 29 front wheels should be known as “B-29ers”. I’ve been planning on picking up a spare built 29 wheel for my Haro 650B 1x9er and that was the nickname I had in my head for the configuration.

  7. Ollie Nash on

    This bike is sick! I have had mine for a couple weeks I could not be happier! I have spent time on a bunch of mixed wheel bikes including the Liteville. In my opinion the Foes is hands down the most well thought out. It feels like it was designed to have 2 different wheel sizes. The others brands feel cobbled to me.

  8. Keith on

    I have owned a Foes Mixer now for about 1 month and wanted to share my thoughts so far. I have been riding an Intense Spider 29er for 4 years prior to this bike. I get out riding about 3+ times a week and would consider myself an advanced rider. So far the Mixer is a great ride. The bike seems more nimble and response than my Intense. Going up hills I get that nice roll over up front and when I really pedal hard I can feel the bike has more acceleration than my Intense. Going down hills the smaller tire in back really does help with drops (I am going off drops where on the Intense I would feel like I wanted to launch over the bars) with a lot more comfort and stability. When the trail has more turns the front wheel performs like my Intense but the back seems to take a tighter line through the curve (I start the curve a bit forward, I then move back over the rear wheel) and the bike will whip thought the curve.
    I have no regrets with the Mixer and my level of riding is improving with this bake. Kudos to the folks at Foes and Timberline for coming up with this bike!

  9. Joel on

    I had a chance to demo the Enduro last weekend. This bike is solid all around!….It Climbs, corners, brakes, jumps and descends amazing…..I PR’d a long climb and the descend on my first ride on this thing…..I loved it and it jumped to the top of my list for a ride in the Spring…


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