My Retrotec Funduro is Rollin’ Again with SRAM GX, Level ULT Brakes and Terrene Chunk Tires

It’s a damn shame. Yeah, it really is. It’s a shame that this bike sat in my storage room, with no drivetrain or brake parts for so long. After reviewing this Retrotec Funduro 27.5+ hardtail a few months back, I couldn’t send the frame back to Curtis. I just loved it so much. After some emailing, he agreed I could buy the frame, but I had to send the Shimano parts back to Retrotec HQ in Napa and buy him a new Chris King 40th group.

Months later, Chris King asked to have the bike for their 40th Anniversary show, so I cobbled together a partially working build with a new SRAM Eagle group and sent it to Portland for display purposes only. Partially working? Huh? You see, SRAM and Shimano do chainring offset very differently and SRAM’s Eagle ring isn’t available in 0mm offset, like their other drivetrain systems are and like Shimano’s XTR cranks are designed, so even though it looked damn fine with all that glistening gold on it, the chainring wouldn’t clear the stay…

Months passed and I had to build this bike back up for Utah. After looking at options, I realized I’ve never really ridden SRAM’s lower-priced MTB groupsets. Namely GX. Hell, I don’t care about weight that much and personally, I’d rather have this thing rolling again, than wait to come up on a XX1 or XO group. GX is affordable, coming in at over half the price of XX1 and right when I was about to buy the kit, my SRAM contact offered to send a GX group to test out. Well, it arrived and the boys at Golden Saddle Cyclery built it up, along with some Level ULT brakes. All that was left were tires.

Some time ago, Terrene sent a few of their tires for me to put into my testing rotation. Now, it’s hard to get me to swap my Maxxis or WTB rubber for anything new, much less on a trip like this, but I decided that the motorcross-looking Chunk Light 27.5 x 3 would be right at home in Utah’s rocky terrain. Was I right? Well…

Full disclosure: in case you didn’t catch this, SRAM supplied the GX group to me, along with the Level ULT brakes, the rest of the bike and parts I paid for. Usually, with product reviews, I let the companies know that just because they sent me components, doesn’t mean they’re getting a good review or even one at all. I really have to be moved by something to take the time to write about it. So here we are…

Gimme the GX

Would you be surprised if I said that I didn’t notice a difference between XX1 and GX? For almost half the price difference, GX performed just as well as XX1, or at least similarly enough that I didn’t notice otherwise. In fact, the only thing that struck me right off the bat was the weight of the crankset, which as I said earlier, I’m not concerned with weight on a steel hardtail. GX shifts crisply, with minimal chain slap and as per the norm with SRAM’s MTB groups, no dropped chains. There’s nothing I could critique the groupset on other than the damn red logos. Why oh why can’t SRAM just make all their logos black on black or at least monotone? I guess you can’t complain with a retail of around $500. It wasn’t until recently that I needed to adjust the cable tension on the rear mech, but that’s expected after the first 100 miles or so.

Level the Playing Field

For years, I swore by XTR and XT brakes. In fact, the brakes I love the most in my MTB quiver are the XT brakes from 2011. I’ve yet to bleed them in all these years of heavy use. All they’ve required was new pads and rotors. When SRAM’s Guide brakes first came out, a very high benchmark was in place with Shimano’s brakes and over the years, each new Guide release seems to meet if not exceed the new XT / XTR counterpart. At least, ATMO. Again, this is all preference, what really matters with brakes is that they: work, feel good and require minimal maintenance.

A good test for brakes is you don’t have to worry about anything. The Level Ultimate brakes are packaged as an XC brake, yet with the right rotor size, I didn’t seem to need any more stopping power on the trails we rode. Are the Level Ultimate brakes the be-all and end-all? Hell if I know. All I can say is they feel great and look great. Time will tell if the Level Ult prove to be as true as my old XT brakes. Retail on these comes in at $297.

Here’s Chunky!

“Damn! Those look like motorcross tires!” Plus-sized tires are something I get excited about when they work. A lot of companies want to loosen the stigma that plus tires are heavy and slow. Unfortunately, that means they lighten them up too much and the sidewalls become victims of rocks, sometimes even on the first or second ride. When I read the name of Terrene‘s 27.5+ tire, I kinda cringed: “Chunk Light.” That seems like a dichotomy that I don’t wanna gamble with. Yet, on the first descent from our camp in St. George, I knew they’d be worthy trailside allies in the battle against snakebike and sidewall tears.

A true test of tire tenacity is a rock garden in one of my local trails where the decomposed granite tends to be sharp and the wrong line almost always ends in a tire tear. While the sidewall didn’t rip, I did encounter a small hole, which a tubeless repair kit resolved just fine. I’d say the feel of these tires outweighs the user-error they had to cope with.


I have to say something about the X-Fusion McQueen, or else people will ask. Yes, it still is a great fork and I have no complaints.

After a few rides on the Zen trail and before we got into the muddy red dirt Utah is known for…

The Full Picture

The Retrotec Funduro is a great bike, fit for smooth cross-country tracks, trail riding and all around singletrack slaying. It feels good to be back on this bike and what better testing ground for a new build kit than Utah’s gorgeous trails. Next stop: Moab before NAHBS in SLC!

Any questions? Drop them in the comments.

31 responses to “My Retrotec Funduro is Rollin’ Again with SRAM GX, Level ULT Brakes and Terrene Chunk Tires”

  1. breed007 says:

    GX is so good. I’ve been running it for about a year now and have had zero issues. I could see going with a higher spec crankset or cassette if you want to save weight, but I can’t see a reason to drop a ton of $ on higher end shifty bits.

  2. Chris Valente says:

    For some reason Retrotecs have never really done it for me but this one continues to blow my mind. I really need a new mtb…

    • Jared says:

      I was always in this boat. But after seeing them in person and knowing how good of a dude Curtis is, I think they are one of the sweetest frames out there with serious building behind them.

  3. Julius says:

    Sweet rod. I also like the pedals. Who makes ’em?

  4. nothingfuture says:

    I’ve never been able to rock the long top tube/short stem combo (due to my freakishly long arms and torso…), but it sure looks nice here. And fat tires are always good in my book.
    I’ve also always had a sweet spot for gear that punches above it’s weight- and the GX stuff used here seems to fall into that category.
    Nice build!

  5. Jon says:

    I cannot get enough of these Retrotecs! Man I wish I had one to rip it up back here in the East. Just a gorgeous ride.

  6. Barrett Hoover says:

    Nice writeup! If you haven’t checked out the new Wolftooth dropper lever you’re missing out. Such a clean setup! Well worth the $60.

  7. Wil says:

    Can I ask, is that fork Boost? I need a new sus fork for the front of my pine mountain and require something boost’d. Don’t want to pay the current crazy Rockshox prices (#thanksbrexit)

  8. Agleck7 says:

    You should get some custom decals for the fork since everything else is so matchy

  9. Max Dilthey says:

    Tell Terrene to stop teasing and make a 29×3 Chunk.

  10. Dexter says:

    Cool build!

  11. So happy to see this bike rolling again! It was a blast to ride it last summer – definitely descending biased but what a shredder! And while it may be made of steel, it’s actually super light. The lightest steel plus bike I’ve ridden for sure.

  12. matt says:

    Funduro is the best name I have heard.

  13. Robert Williams says:

    John, just curious if you have thoughts on 27.5+ vs 29, i.e. how does this bike compare to the 44 Bikes Marauder you reviewed a while back? Are there obvious conditions where one excels over the other?

    On a side note, I lived in Southwest Utah for a few years and these photos are bringing back lots of good memories. Thanks for posting so much content from your trip. Cheers.

    • John Watson says:

      I’ve actually ridden this bike with 29r wheels and it’s still quite shreddy. I like a plus tires for situations where you’ll benefit from having a bit more rubber to soften / soak up the trail. The only main difference I notice between 27.5+ and my 29r is the 27.5+ is more sluggish climbing. That’s usually due to either lower pressures or more aggressive tread patterns though. My opinion: get a bike that can do both.

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