WTB Riddler Tire Test


Wilderness Trail Bikes has been around a long time. They came to creation in Marin county what many consider to be the possible birthplace of Mountain Biking. The scene in the late 1970's and early 1980's was much different in Marin. The times have changed and WTB has evolved and is now making tires, saddles, grips and their own rims. We gave them a call to get a some tires to test out. Our terrain is about 85% rock with spatterings of soil the dusty kind with no traction and marbled out high speed loose trails with no berms. It takes a hell of a tire to perform well in San Luis Obispo. Using a semi slick on the back helps get me up the hill a bit easier so The Riddler was the rear tire we chose to use first.

"WTB was founded in Marin County, California in 1982, fueled by the need to create durable and reliable mountain bike-specific equipment. Back then mountain biking was a new and burgeoning sport, and mountain bikes weren’t much more than cobbled-together oddities. The original WTB crew was captivated by the experience of riding bikes on dirt trails, and they started creating more durable and functional components for their own bikes. Soon, local frame builders sought to outfit their bikes with WTB’s high-end components. WTB was able to turn our passion for bikes into a successful business.

Today WTB is a global enterprise; our innovative components are used for trail riding, transportation, recreation and elite racing across the globe. After 30 years things have changed a bit here at WTB–our little garage has morphed into a real office and the bikes we ride and the components we make have evolved to meet the needs of today’s riders, racers, and commuters. What hasn’t changed is our passion for cycling and our commitment to providing the cycling community with durable, reliable, high-performance components."

We contacted WTB to get ahold of some of their latest tire offerings. A week later we had a box with Vigilante, Riddler and Breakout tires to test out. We are running The Vigilante tire as a front tire with The Riddler as the rear tire. Many riders in our area have been raving about The Riddler since it first came out. Our terrain is very rocky, dry and loose. Basically for ten months out of the year you are riding on marbles.

"Born from the need to race in European enduro events, the Vigilante is our premier aggressive All Mountain tire, and first choice for Team WTB’s Mark Weir.  The square-lugged, open-tread pattern offers stability in loose or wet terrain, while the stiff outside knobs grip at lean angles like nobody’s business.  With Dual DNA (TCS) and Gravity DNA (Team Issue) rubber, this is the tire to ride when you are giving it your all."

Mounting the WTB Riddler was a snap. We did it with a floor pump and without using soap mounting them to 30mm rims!The Easton ARC did ever so slightly flatten out the Riddler's tread profile BTW. We had the 27.5 2.4 TCS Tough Fast Roll casing our tire weighed 1060 grams. That is a bit more than advertised but we have seen DH tires vary by 200 grams! If you are that worried weigh each tire in the store before making a purchase. 

WTB Riddler Features 

  • Actual weights: 
    • TCS Tough-1056 grams
    • TCS Light-869 grams
  • Actual widths:
    • 2.4: Tread-2.29" Casing-2.2"
  • ETRTO 584
  • Fast Roll compound is 60A durometer
  • TCS Light casing is supple and conforming
  • TCS Tough casing is dual-layer for protection
  • Folding bead
  • Round profile
  • Fast rolling center tread
  • Aggressive cornering knobs
  • TCS - Tubeless Compatible System - Uses sealant to seal inside of tire, will NOT hold air without sealant
  • Enduro Pro Nathan Riddle signature tire
  • Made in China
  • WTB part #'s:
    • TCS Light, Fast Roll-W010-0586
    • TCS Tough, Fast Roll-W010-0587

Our first ride on the Riddler was on a trail that we ride every week. It is about 700 feet to the top and getting back down it takes around 4 minutes. There had been a good deal of rain the last few weeks so our soil that usually feels like you are riding on ice was actually providing decent traction. Entering the first few turns I was shocked how much bite the tire was offering both in braking and while being leaned over. I was a bit worried with it being a semi slick. The soil around here is clay based and packs up quick! The fourth turn on this trail is a severe off-camber left hander that is very sharp about 120 degrees the front of the bike offered copious amounts of grip and i just got the Riddler to brake loose with a hard pull on the brakes. We are running 203mm rotors and Hope Tech 3 V4 brakes and The Riddlers resisted breaking loose in shocking fashion.

The next trail is about 900 feet to the top. Fast times going down are about 2:30 or so. This trail has a rock garden that is about 300 yards in length. After that you enter the trees and begin riding on a hard pack dirt. This section is very fast and filled with fast gradual turns. I was running 25 PSI on the front tire and just below 30 on the rear. Even though we had the fast roll version the rear tire offered very good traction in the baby heads. Lower down the trail the Riddler did well in the high speed hard pack.

San Luis Obispo is know for having fast loose and rocky trail. That was what the next trail is know for. I can do it in 9 minutes the record is in the low 7 minute range. On this trail you can easily get up to 30 mph on the top section. It is fire road width and filled with good size embedded rocks (the kind that pinch flat) and for good measure these are coated with smaller loose rocks to make it extra slippery! I pinged my rim a few times hard and the tires had no issue. There are a few corners that are long and off camber and when riding an aggressive trail bike you need to be pressing the front end down. WTB seemed to have done a good job with The Riddler they offered good traction on the loose rocks. I know the sticky version would have been even better. These are semi slicks so ruuning a full tread tire would have offered more grip over the loose stuff.

There is a trail in town that is short and pretty rocky. Not exactly Santa Barbara rocky but has some good size rocks in it. The rocks here range from golf ball up to beach ball in size. They are almost all round so it can be fun to bounce through them. Tires that are super sticky will allow a rider to cut edges off of these rocks easily. The WTB Riddler was almost able to do this. Having aggressive side knobs helped the tires stick to the rocks. Riding large rocks like this is not very challenging for the modern tire to get good traction on. This is more a test of its ability to avoid pinch flats. It slid off of some of the smooth rounded rocks and others it held enough traction to let me glide over an edge. Overall the tire did very well and in fact I got one of my fastest times down this trail and I had not ridden it in almost 6 months!

Being close to the ocean provides us with trails that are more sand based. These are great to ride post rain or even during the rain. I went out here and made my way up the hill it is about 800 feet to the top. fast riders can get down in under 8 minutes it usually takes me 9 minutes. This trail is very fast to start then you drop down into a valley and it is filled with turns and rocks. Lower down you are floating on top of a fine sand layer and things can get twitchy at speed. The WTB Riddler did well on this sand filled trail when it was wet. The tire held traction in the turns and had no issues crushing over the rocks. Lower down it floated its way over the sand without issue. I went and road this during a heavy downpour and the tires worked incredible in these lower sandy turns BTW. When the trail dried out a bit they began to fight the trail for traction while using the brakes and not being leaned over.



Overall I was impressed with The WTB Riddler tire. It worked well as a rear tire on our traction deprived trails. They did a good job making a tough casing that will tolerate low PSI and not tear of flat easily. The tire did well in rock, hard pack and decent sandy trails. I also did some riding when it was pretty wet out and it did decent in light mud as well.

It rolls pretty fast and has good grip once you lean the tire over. Deciding if the rolling resistance benefit if worth the traction decrease in straight line braking will largely depend on your soil and riding ability.

This isn't the lightest tire out there some other companies offer tires around 900 grams but you have to ask yourself if a 200 gram savings is worth a flat or destroyed rim. WTB does make a lighter version if weight is a big concern for you. Having a tire that sticks in varying terrain is great. This is a tire I would highly recommend to a friend. Down the road when looking for a semi-slick rear tire The WTB Riddler will be on the short list.

WTB Riddler Questions

1.     Give us a “quick” history of WTB.

Started early with the idea of doing what was not already done. Making parts to provide for complete bikes led to surplus production and bike shop sales. Maturing markets took WTB from designing for others to promoting the WTB brand and production in Asia for OE and replacement parts. The soul has never been lost though the price point pressure is high.

2.     What goals or concerns did you have when designing the Riddler?

Rolling fast on the straightaways, while still having the ability to dig in while corner. Those were the two primary goals when designing the Riddler. We found that, in certain conditions, ensuring traction with the tire upright required only a minimal amount of tread prominence along the centerline of the tire. In an upright position, with the rider's weight directly over the centerline, we didn't need tall knobs to keep the tire from sliding. Yet, of course, the knobs were still needed on the outer edge to deliver bite when the tire was leaned over. 

3.     Was weight, reliability or traction the biggest concern?

Though we wouldn't say that weight was specifically our biggest concern, being fast rolling and minimalistic was the focus. We aimed to reduce rolling resistance and increase speed without sacrificing traction where it is needed most. With the Riddler 2.25 275" TCS Light tire coming in at only 780 grams, it's amazing how much grip it delivers while still being a resilient tire. 

4.     Who created the tread design?

WTB has a variety of people that have an influence on how the various tread patterns produced get done. In order to ensure we approach the design from numerous angles, we never leave the design process up to a singular person. In this case, Evan Smith, WTB's product design engineer, teamed up with longstanding WTB athlete Nathan Riddle to create the tire. Riddle came to us with specific needs for a tire that hooked up on race day without slowing the pace. Riddle was such a driving force behind the Riddler than it was a clear choice to name the tire after him. Click here for a more in-depth story behind Nathan Riddle's involvement with developing the Riddler. 

5.     What widths is the Riddler available in?

For 27.5-inch versions, the Riddler is available in both 2.25 and 2.4-inch widths, while the 29-inch version is currently available solely in the 2.25-inch width. While all Riddlers are available with a TCS Light / Fast Rolling casing, the 27.5" 2.4 version is also available as a TCS Tough / Fast Rolling version. 

6.     What about a tire with multiple durometers? (60/42)

The Riddler is in fact dual durometer. Initial production tires of the Riddler were 60/50, though we've since made a running change to 60/45. With a tread pattern as specific as the Riddler, using a dual durometer rubber compound is the only way to go when you're combining a fast rolling design with meaty knobs.

7.     When will a fat bike win an EWS race?

When it all freezes over and flotation is the only way to make time and speed.

8.     What would help the bike industry the most? ($, lowering cost, more trail access)

More people on more bikes more often in more places. If the bike industry makes more money, it will most likely put it into product technology and marketing. Most companies won’t spend a large part of the profit on advocacy, as WTB does. We spend so much on bike advocacy that it actually harms our business at times. Lowering cost is a human rights issue. We don’t support low quality of life for the people who make bike parts and nor should anybody else. Lack of trail access can make it hard, or impossible, to ride mountain bikes in an efficient manner. You see this in areas where the only way to get in a good ride is to jump in the car and drive hours. You basically have to take a half, or whole, day to go on a decent ride when driving is involved. Easy access to trails for everyone will allow bike sales to flourish.


9.     Who is the better rider Nico, Tomac or ACC?

If you ain’t first, you’re last! Let the results do the talking. We are not fit to judge. Better yet, ask each of them about the other.

10.  How is the hiker/biker conflict in Marin these days?

Cooled out for the most part. The best interaction is none at all. In the last couple of years we’ve seen a lot more public discussion between both parties on the issue of trail access, and how to best share the open space that we all enjoy. Facilities like the Stafford Lake Bike Park opening up provide great opportunities to showcase our cycling community, as well as teach up-and-comers bike skills and trail etiquette. We think things will only improve given the amount of cyclists in Marin, it just takes time and careful planning.

12.  What is with all the new “standards” the last 5 years?

Improving the breed requires vigilance. Standards do not become “standard” unless they are worthwhile. And just like science they are only as good as the current best effort and knowledge.

13.  Can America make a race organization that will surpass the UCI? Like real payouts and corporate sponsorship?

That is doubtful, for now. Mountain bike riding is increasing in the states, mostly due to NICA (National Interscholastic Cycling Association), which is getting the next generation of riders on bikes. In turn, more parents and family members of these youth are getting on bikes as well. This builds fans of the sport, and fans of racing, which will ultimately feed America’s hunger to have more high-level races on our home turf and increase support for the organization of a solid cycling federation. Surpassing the UCI is a hefty goal, but thinking bigger is how we get outside the box.


 14.  Anything you want our readers to know about the Riddler?

Though fast rolling and expeditious, the Riddler is not a tire designed solely for those looking to cut down on time. It's an excellent tire for any trail bike that spends its time on hardpack to loose-over-hardpack to damp trails. Mostly commonly used as a rear tire, we often find riders using it on the front as well.



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