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Donnelly Tires LAS Tubeless Ready Cyclocross Tire
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Donnelly Tires LAS Tubeless Ready Cyclocross Tire


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Mfg PartNum: D10025
SALE: $67.90
MSRP: $70.00
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Viva LAS Velocity

The Donnelly LAS Tubeless Cyclocross Tire is your choice for a low-profile, high speed CX tire. The diamond-file tread at the tire center offers extremely low rolling resistance for flat-out efforts. However, the tread grows larger as it moves outside to the race-proven PDX side knobs for incredible grip in corners.

LAS is the airport code for Las Vegas, Nevada, the original home of the world-famous Cross Vegas cyclocross race. This mostly grass course required the fastest tire a racer could use and the LAS delivered. Far from the Mojave Desert sands though, this is also the go-to for snowy, rutted, icy cyclocross courses conditions when you need as much surface contact as possible to keep your tires planted.


  • Diamond file tread pattern for low rolling resistance
  • Side knobs offer superior cornering
  • Soft rubber compound provides extra grip and shock absorption
  • Precision design creates a straight tire with no variances in size or alignment
  • Tubeless Ready
  • 700 x 33 (33-622)
  • 120 TPI

B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

The product weight specified is an approximate weight based on the manufacturer's specifications (if available) or our measurement of one or two examples. For most products, the weight will typically vary by 5% to 10%.


Weight: 464 grams

Mfg PartNum: D10025 

Wheel Size: 700C/29" (ISO 622) 

Tire Width: 33mm (1.3in) 

Tire Type: Tubeless Ready 

Threads Per Inch: 120 


Ordered by Most Relevant First
5 stars
4 stars
3 stars
2 stars
1 stars
Reviewed 11/2/2023
by Makana
Santa Cruz
Overall Rating
Impeccable Tubeless CX Tire

Best tubeless tire ever, I think.

I've used a lot of tubeless road, gravel, and MTB tires, but never have I had this stellar an experience with one.

This tire fit so beautifully on the rim. It was the average effort to get it on the rim compared to the other tubeless road and gravel tires I've used, but it got much better from there. When I inflated it, the bead popped right into the rim and it instantly held air, no leaking, without using any sealant. Ive never experienced that and I was stunned. It didn't lose any pressure, at all after sitting. I did deflate it and add sealant before riding it.

On the road it initially made a bit of noise, but that went away after a couple miles.

Traction on the road, wet or dry, and on dry dirt has been good, and it feels fast.

Thank you Donnelly! A new higher bar has been set, for me

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Reviewed 10/28/2023
by Anonymous
New Jersey
Overall Rating
Nice tire

Easy mount, surprisingly quiet, BTD always quick

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Reviewed 10/16/2023
Competitive Racer
Value Rating
Overall Rating
Grippy enough, too wide for UCI

Handles well, but inflates too large for UCI racing (larger than 33cc)

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Mechanic's Corner

Articles will open in new tab.

A guide to bicycle tire sizes, both standard on newer bikes and common on older bikes.
An introduction to cyclocross tires.
Understanding older bicycle tire sizes.
A useful chart for determining the tire size you need for your bicycle.
Tire Tips   
Tips for proper bicycle tire mounting and tire safety.
A guide to understanding tire width.
A guide to understanding bicycle tire tread patterns and what you should look for.
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