Horse for the Course: Grinding away at Grinduro

A Devinci Hatchet Carbon for a gravel bike enduro

“Don’t forget to enjoy the view — this whole thing isn’t a race!” a woman called out as I sped past an aid station.


She was right. There was no need to go full bore for all 60 miles of this race. I kept forgetting that. I’ve done my share of enduro races, but I was having difficulty wrapping my head around the concept of a gravel race with timed segments.

That’s the beauty of Grinduro. You go hard for five to 10 minutes at a time and spend the rest of the day riding with 700 other cyclists at a party pace.

Go hard when you have to, but don’t forget to take in your surroundings
Colin Meagher Photography

There are four stages along the way. Stage one is a one-mile gravel hill climb, stage two is a six-mile gravel road descent, stage three is six miles of rolling pavement and the fourth and final stage is a three-mile singletrack descent. The unique format and diverse terrain make gear selection critical.

  • The horse: a mostly stock Devinci Hatchet Carbon Di2 Ultegra with a few race-specific modifications
  • The course: a 60 mile mixed surface route with 7,500ft / 2,300m of climbing and four timed stages

Rise and grind

Devinci’s new Hatchet Carbon was my weapon of choice
Josh Patterson / Immediate Media

The “Lost Sierra” region of Northern California sits at the northern end of the Sierra Nevadas that form the spine of California and the beginning of the Cascade Range that winds up the Pacific Coast into Canada.

Gold mining and timber extraction brought the first settlers to the area. Logging still plays an important role, but recreation, specifically mountain bike tourism, is bringing a much-need boost to local economies.

That’s part of the mission of the Grinduro. It’s a non-profit event that supports the Sierra Buttes Trail Stewardship, the advocacy organization responsible for building and maintaining the region’s network of stunning singletrack.

Grinduro showcases all sorts of custom creations
Dain Zafke

Racing is just part of the Grinduro experience. It’s celebration of cycling, with exhibitions by custom frame builders, live music and no shortage of beer and food.

I arrived in the sleepy logging town of Quincy, California, in advance of the Grinduro to get acquainted with Devinci’s new gravel bike. This Canadian company used the event to showcase the Hatchet Carbon Ultegra Di2. Devinci must have been confident in its durability, considering what we would put it through.

Devinci Hatchet Carbon Ultegra Di2 review

The Hatchet’s rear end has a bit of tuned flex to help take the edge off
Josh Patterson / Immediate Media

Race modifications

The Hatchet comes stock with the 700×40 Maxxis Re-Fuse, which is essentially a high-volume slick tire. It’s a good option for most mixed-surface applications, but we needed something with more bite for the loose gravel and singletrack we were riding.

The stock tires were swapped for WTB’s 700×40 Nano. This tubeless-compatible tire really impressed me with its grip and durability. I ran 38psi in the rear and 35psi in front. This is slightly higher than what I would have preferred to run, but given the abundance of sharp rocks on the gravel singletrack stages, I opted to play it safe.

WTB’s 700×40 Nano tire proved tough enough to survive the Grinduro
Josh Patterson / Immediate Media

I also made some minor fit adjustments for Grinduro that paid massive dividends by the end of the day. I raised the handlebar by about 1cm, lowered the hoods and shortened the reach so that the position was optimized for riding in the drops. This gave me more braking control when descending and greatly minimized hand fatigue.

Shifting the hoods down gave me better control of the levers while riding in the drops
Josh Patterson / Immediate Media

Spot-on stock components and room for improvement in others

The carbon Hatchet frame was comfortable and proved it can take a beating. Another item that proved its worth was the FSA handlebar. It has 12 degrees of flare, which gave me a wider stance and more control in the drops. For me, this angle just feels more natural. 

The Shimano Ultegra Di2 drivetrain did its job, mostly. I say mostly because the 11-36t cassette and 50/34t crankset provided all the range I needed for the grinding climbs and fast descents. In this sense, I was very glad I was not on a 1×11 drivetrain such as SRAM’s Force 1 group. However, I would have preferred to have the clutch rear derailleur that’s part of SRAM’s 1x road group. I dropped the chain no less than three times while hammering the gravel road descent.

Shimano, it’s time to step up your game with clutch-equipped road derailleurs — gravel and ‘cross racers will thank you
Josh Patterson / Immediate Media

Five lessons I learned at Grinduro

If a rolling party with occasional racing sounds like something you would like to do, here are five lessons I learned that might help you get your Grinduro on.

1. Dropper posts aren’t necessary

You don’t need a dropper for Grinduro, just drop it before the singletrack and you’re good to go
Colin Meagher Photography

As a mountain biker, I will look for any excuse to run a dropper seatpost, and Grinduro is essentially a gravel bike enduro. I was open to the idea of running a dropper for this event, but after examining the course, I decided that the only stage where it would be advantageous was during the final singletrack descent. That meant that I would be riding a heavier, harsher-riding seatpost for most of the day with no performance benefit.   

Since only four sections are timed, there was no penalty for stopping to manually drop the seatpost, which is what I did for the final singletrack stage — simple and effective.

2. Tire choice will seal your fate