Box One 120 TPI 20
Box One 120 TPI 20
Box One 120 TPI 20
Box One 120 TPI 20

Box One 120 TPI 20" (451mm) Folding Tire

$49.99 Sale Save
6 reviews
Size 20 x 1 3/8"

Only 0 left in stock


Box One™ 120 TPI Folding Tires were engineered with a minimalist approach to hit lofty goals for weight, traction, rolling resistance, and rebound. At its heart is a super-supple 120TPI casing where we forced in as much rubber displacing nylon as possible. Skin walls are employed to reduce drag and further reduce weight. We flanked the high-density casing with a tightly packed hoop of aramid fibers. Finally, we draped this all with BMX race-specific tread that transitions from a center band with a large contact patch to unidirectional tactile knobbies on the sides. This aggressive combination allows for maximum traction out of the gate, immense adhesion in the corners, and low rolling resistance in the straights. A state-of-the-art mixture of compounds is used in various areas of the apex, wall, bead seat, and center – with higher silica content in the tread to again remove more weight. 

Note: Not a tubeless tire

Reference: BMX Tire Size Tech Sheet

120 TPI High-Density Casing
Aramid Folding Bead
High-Traction Directional Grooves for Starting Gate Grip Point
Low Rolling Resistance Center Strip Chevrons
Countless Ramped Hexagonal Directional Knobbies

BMX Tire Size Tech Sheet: 

20 x 1-1/8" - 187g
20 x 1-3/8" - 234g

Customer Reviews
4.5 Based on 6 Reviews
5 ★
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Filter Reviews:
Nologo U.
United States United States

Great company

The product is and always have been second to none. We will continue to use box and all of their products.

Easton L.
United States United States

Well worth the switch

Fast and.light better for wet tracks.

Cyclecraft B.
United States United States

BOX One Tires

Very nice! Thanks for the quick shipping too!

Kevin D.
United States United States

The only tire I will use now

I was hesitant to go with Box tires again for my son's bike. The previous Box Hex Labs incarnation were a mother to get on even with their rim. Grip was suspect as well, but to be fair I always had psi maxed out which was probably unnecessary for a +/-50lb kid. They were light though, and that was one definitely appreciable aspect over some other offerings in the 1-1/8 range. Thought I was settled on Tioga's PowerBlock S-spec but when the new Box Ones came out with an improved tread design and being the lightest tires 1-3/8 tire I'm aware of I went for it. Couldn't be happier with these tires, grippy AF, AND fast rolling. No production issues for us.

Sebastian R.
Canada Canada

Box One 120 TPI

After weekend of racing the tire has already start deteriorate. When the wheel is spun you can see the centreline of the tread expanding causing the tire to no longer run true. The kicker is this isn’t the first set of tires either. I had previously raised this up to Box with photos and didn’t receive a response. Perhaps using a different adhesive may work.