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Cross Boss TCS Light Cyclocross Tire

  (6 customer reviews)
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Wilderness Trail Bikes, aka WTB, has been making exceptional trail-ready products since 1982. The Cross Boss TCS represents the company's latest gravel and cyclocross application.

The Cross Boss has an even center tread shelf for smooth and fast acceleration with ample bite on hardpacked "brown pow". Measuring at 700x35, the Cross Boss TCS is a fine choice for tubeless applications. Wider tires set in much easier on tubeless rims and greatly reduce the likelihood of burping air when used at lower pressures. In addition to WTB's own TCS rim profiles, the Cross Boss sets up easily on the majority of tubeless compatible rims (note: TCS tires such as the Cross Boss are not compatible with Stan's NoTubes BST rim profiles). The Cross Boss TCS has a Dual DNA rubber compound with ample cornering channels to keep handling dialed in loose conditions.

If you live in an area with dry to damp trail conditions and you're looking for a wider cyclocross tire for everything from racing to trail poaching, the Cross Boss is a fine choice. The TCS Cross Boss has a folding bead, fits 700c rims, and weighs 400g/tire.


Weight: 400 grams


Weight: 400 grams


Tire Type: Tubeless Ready 


ISO (ETRTO) Size: 35-622 

Ordered by Most Relevant First
5 stars
4 stars
3 stars
2 stars
1 stars
Not so good
by pissed
Cycling Enthusiast
greenfield, ma

I had the same problem as Dr. Dilweed. Extremely hard to seat on rims that no other tires have had any problem with. I don't know what psi was needed to seat tire, but was well in excess of 150psi., plus soap on the bead. Sealant bleeding through tire. 3 flats in 3 rides. Don't buy these tires.

Reviewed 4/10/2018
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not as solid as I was expecting
by Dr Dilweed
Competitive Racer
North East, MD
1 of 1 customers found this review helpful.

I carefully chose these tires for a couple of CX races before I switched back to my go-to gravel tires as I work-up for another go at Dirty Kanza 200. The reviews for these were all very favorable and the price seemed tough to beat, so I was excited to try these out. Right away we (me and my LBS) had difficulty getting them to seat on my carbon rims that all other tires have seated almost instantly. Then I noticed a few spots along the sidewall where sealant was bubbling, but that soon stopped, figured I was good to go. Did a couple warm up rides before my CX race, didn't really have any trouble, but they did seem to need quite a pump-up each morning compared to other tubeless tires I have used. CX race went fine with respect to the tires, but then a few days later I went on a gravel ride and the rear went flat. I fount the hole, used a plug in it and was able to get it to hold airCO2, but had to re-fill 2 more times to finish the ride. I hope I just had two bad tires - based on the other reviews this was an unusual experience.

Reviewed 11/7/2017
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Great Tubeless Option
by Anonymous
2 of 2 customers found this review helpful.

The tires worked perfectly in a tubeless setup and allowed me to finish cross season with no flats!

Reviewed 1/12/2017
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outstanding tire for gravel and pavement
by LunarLander
Competitive Racer
San Diego, CA
6 of 6 customers found this review helpful.

I was sweating bullets waiting for this newly introduced tire in TCS version to arrive far enough ahead of this year's Dirty Kanza 200 mile gravel race for me to test it. Fortunately, it did finally arrive about 3 weeks before the race and I put it through the wringer, riding it on the nastiest gravel I could find, at high speed, pushing it through corners, TRYING to ride it through stuff where it should flat so I'd know what it's limits were...but I couldn't get it to flat. I also rode it on rocky MTB single track, sand, you name it...nothing bothered it.

It survived 124 miles of Dirty Kanza flawlessly (I had to pull due to a broken GPS, no water, and massive blisters from carrying my bike for 3 miles across the mud stretch). In fact, the tires are still showing just nominal wear, especially in the back...after over 800 training and racing miles on tough terrain, that's amazing.

This tire has decent volume, is reasonably compliant, has adequate traction on dry hard, loose over hard, sand. Loaded up completely in the peanut butter mud of Dirty Kanza, but I'd have to think so did every other tire. On pavement this tire is very fast and holds high speed corners very well. The one downside is that it's a bit heavier than I'd like, but there's a balance between weight and durability. Overall, the tire is a winner, with zero flats running tubeless with Orange Seal.

Reviewed 8/14/2015
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Tremendous tire
by Anonymous
Competitive Racer
Northeast USA
3 of 3 customers found this review helpful.

I love my MTB's tubeless setup so much, I decided (after several seasons of dealing with CX tubulars) to take the tubeless plunge with this tire. I have them mounted on Velocity A23s using Stan's tape and sealant, and the setup is brilliant. I'm about 190lbs and I've gone into the 25-30 psi range with zero burping.

Did three CX races on them toward the end of last season with no flats or problems of any kind, and just did a big on-roadoff-roadsingletrack kind of ride, and once again, these tires really shone. They were fast on the pavement, dug in on the soft stuff, and I felt very confident in fast corners (both paved and dirt).

Never going back to tubulars. I'll mostly likely replace these with the exact model for as long as WTB keeps making them.

Reviewed 7/20/2015
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A top performer in many ways for the tubeless CX tire category... A
by FatDirt
Competitive Racer
Sacramento, CA
4 of 4 customers found this review helpful.

This tire, by far, has been the easiest CX tire to setup tubeless. I have mounted this tire on both tubeless ready rims and non. Both rims seated the bead with just a floor pump and held a tight seal from the start. I am using sealant (Orange Seal) and it continues to maintain a 99% seal - even after weeks, these tires don't seem to lose much pressure.

I raced CX on this tires during the last two comps of the season. The are GREAT! They are a great all-around CX tire, as the tread pattern seems to hookup on all but the muddiest of conditions. Being a clydesdale (240), I was running TPIs of F34 R37 and the tires provided a plush, but connected ride. The 35mm width is a perfect balance of volume vs. rotational weight (only 400 grams!) They have yet to burp... even on the off-camber sections during intense CX racing. I have commuted and gravel grinded on these tires... obviously, they are not an ideal pavement tire, but they are surprisingly quiet. On gravel, these tires shine. I plan on running these tires in the Lost and Found gravel, as the varied conditions in that race will match this tires capabilities.

My final opinion is that, if you wanted only one tire to cover most conditions well, this would be the one.

Reviewed 3/5/2015
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