Downieville Classic Tire Testing | Play it Safe or Risk it All? [Video]

The Ultimate Downieville Classic Tire & Wheel Experiment

By Liam & Tydeman

Downieville, California, is world-renowned for its brutal combination of high-speed XC climbing and razor-sharp, rim-destroying rock gardens. If you’ve ever raced or ridden there, you know the eternal dilemma: do you run ultra-light tires and wheels to save watts on the grueling 80+ minute climb, or do you run heavier, bombproof casings so you don't slice a sidewall open on the rowdy descent?

We decided to stop guessing and head up to Downieville for a multi-day wheel and tire testing strike mission on our short-travel bikes. Here is what we learned, what we destroyed, and the setup balance we landed on for race day.

The Testing Variables: Light vs. Heavy Setup

We each brought two distinct setups to test back-to-back on the exact same trails (including Butcher, Sunset, Sunrise, and Third Divide).

The goal was to see if a lighter wheel set with a heavier/grippier tire felt better than a heavier wheel set with lighter, faster-rolling tires.

1. Tydeman's Test Lab
Setup A (Light Casing): ENVE XC28 wheels wrapped in WTB Peacekeeper (120 TPI, Light Casing, Fast Rolling) up front and a WTB Macro (120 TPI, Light Casing, Fast Rolling) in the rear.

Setup B (Heavy/Durable Casing): Industry Nine (i9) wheels wrapped in WTB Peacekeepers (60 TPI, High Grip) front and rear, with tire inserts.

2. Liam's Test Lab
Setup A (Light Tire / Heavier Wheel): ENVE M5 Pro wheels with a WTB Peacekeeper (120 TPI, Fast Rolling) front, WTB Macro (120 TPI, Fast Rolling) rear + Tubolight insert.

Setup B (Heavy Tire / Lighter Wheel): Berd Hawk 30 Gold wheels wrapped in a WTB Peacekeeper (60 TPI, High Grip) front and a WTB Ranger (60 TPI, Fast Rolling) rear.

Fun Fact: Liam's Berd/60 TPI setup and ENVI/120 TPI setup ended up weighing within 30 to 40 grams of each other overall. This allowed us to isolate the exact feel of tire casing supple/rolling speed versus wheel feel.

Day 1 & 2: Sharp Rocks, Pinch Flats, & The Reality Check
It wouldn't be a true Downieville test trip without trailside repair drama.

Right out of the gate on Day 1, Tydeman came up the rock wall at the end of Third Divide and pinch-flatted his front wheel after taking a direct square-edge impact.

Day 2 brought the real wakeup call for Tydeman. While ripping down Third Divide on his 120 TPI lightweight setup, he was feeling fast and smooth—even declaring, "This is 100% what I'm running on race day."

Minutes later: CRUNCH.

A tiny, razor-sharp rock barely an inch high sliced open the tread on his rear tire. After plugging it with a WTB MegaPlug and a Dynaplug, sealant was still spraying everywhere. We had to throw a tube in and sprint down the mountain to catch our shuttle with 20 minutes to spare.

The Takeaway on Casing & Trail Feel

• 120 TPI Casings: You immediately feel the efficiency. Coming out of corners, the bike snaps forward and feels like it gives you an extra 20 watts on flat, pedaly sections like Sunrise Trail. However, they leave zero room for error when you're fatigued.

• 60 TPI Casings: Visibly dampens the ride and provides confidence through rock gardens. The trade-off? The heavier casing feels noticeably slower to accelerate ("snap") out of slow-speed corners, and you feel the rolling resistance when pedaling flat terrain.

Trail Traction: Peacekeeper vs. Macro

Downieville is notoriously loose, dusty, and unsupported through wide sweepers.

• WTB Macro: Fast as lightning on straightaways, but we were chewing through the side knobs quickly in the sharp granite moss.

• WTB Peacekeeper: Provided significantly better cornering confidence. Being able to trust the rear tire through loose sweepers on Butcher or Sunset allowed us to stay off the brakes and carry momentum—saving seconds over miles of trail.

The Final Verdict: What We’re Running on Race Day

When you’re gasping for air after an 80+ minute climb, your legs are cooked, and you’re riding in "passenger mode" down Gold Valley, you hit rocks you wouldn't normally hit. Safety and reliability beat out absolute minimal weight every time.

Here are the dialed setups we landed on for the race:

Liam’s Race Day Strategy

• Wheels: Berd Hawk 30 Gold

• Front Tire: WTB Peacekeeper (120 TPI, Fast Rolling) + Insert (Saves weight/adds speed up front where pinch flats are less frequent)

• Rear Tire: WTB Ranger (60 TPI, Fast Rolling) + Insert (Provides sidewall puncture protection when smashing rear wheels into unseen rocks)

Tydeman’s Race Day Strategy

• Wheels: Gulo Composite Wheels

• Front Tire: WTB Peacekeeper (120 TPI) + Insert

• Rear Tire: WTB Peacekeeper or Ranger (60 TPI, Fast Rolling) + Insert

Big Thanks

Huge shoutout to WTB for supplying the tires and letting us destroy a bunch of fresh rubber in the name of testing! Having the option to choose between 120 TPI and 60 TPI across the same tread patterns makes dialing in a custom front/rear race setup way easier.

Bridging the gap between XC speed and aggressive trail handling, the WTB Peacekeeper hits a sweet spot. Featuring a fast-rolling center tread paired with stout, aggressively spaced shoulder knobs, it handles dry, dusty, or slightly damp conditions with ease. While the standard 60TPI version is tough, opting for the premium 120TPI casing elevates this tire into a beautifully supple trail companion that tracks perfectly over roots and square-edge rocks without a harsh weight penalty. It rolls with surprising momentum on the flats but lets you drop your elbows and corner with confidence when the descent gets rowdy.

The question for Downieville is: do you run the 120TPI version for all out weight savings and speed, or the 60TPI version for a little more insurance while blasting over countless rocks?

Run it as a front tire paired with a WTB Macro or Ranger in the rear for a balanced, high-speed downcountry setup.

The Macro is WTB's triumphant re-entry into the pure, fat-tire XC race scene. The centerline knobs are incredibly low (around 1mm tall), making it an absolute rocket ship on hardpack surfaces. Yet, thanks to WTB’s premium TriTec compound—which utilizes a firmer base layer for rolling efficiency and softer rubber on the shoulders—it finds an unbelievable amount of friction grip. It tracks predictably at lower pressures, offering a smooth, damped feel on the trail. Just keep in mind that with knobs this short, the transition from grip to drift happens quickly. An elite rear tire paired with the Peacekeeper up front, or run dual Macros if your local loop is bone-dry and fast.