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Surly Knard 650B x 41mm Adventure Tire
Surly Knard 650B x 41mm Adventure Tire
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Surly Knard 650B x 41mm Adventure Tire 1
Surly Knard 650B x 41mm Adventure Tire 2

Surly Knard 650B x 41mm Adventure Tire


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MSRP: $58.00
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The Surly Knard Adventure Tire is designed for going fast over a variety of terrain. Featuring a balanced tread pattern made up of low, closely spaced knobs, the Knard digs into turns for aggressive grip while rolling smoothly for efficient riding. A 60 TPI Tubeless Ready construction makes this an economical choice, offering affordable performance.


  • Balanced tread pattern of closely spaced knobs.
  • 650x41mm.
  • 60 TPI casing.
  • Tubeless compatible.
  • Claimed weight: 510g.

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: 510 grams

Wheel Size: 650B (ISO 584) 

Tire Width: 41mm (1.6in) 

Threads Per Inch: 60 

ISO (ETRTO) Size: 41-584 

Max Pressure: 75 psi

650b x 41mm - Tubeless Ready

Mfg PartNum: TR7509 

Tire Type: Tubeless Ready 


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Reviewed 3/11/2022
by Anonymous
Overall Rating
3,500 miles with no flats and plenty of tread left

I purchased a Surly Straggler last June and have over 3,500 miles on the original 650b Knard tires. I have the 30 tpi rather than the 60. I am running with tubes and have not had any flats. Most of my riding has been paved or hard pact trails. The tires have very good grip on asphalt and dirt. Very easy rolling and after 3,500 miles there is still plenty of tread. I run between 40-45 psi in the tires but have taken them down to 30 on occasions. I have been looking for replacement tires but have not found anything better for the performance, reliable, and price. I will get the 60 tpi tires if my current tire ever wear out. I am averaging about a 1,000 miles every 3 month so I will see how they do with 4,000 miles on them. Great tire.

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Reviewed 1/17/2023
by Dave T
Cycling Enthusiast
Colorado Springs
Value Rating
Overall Rating
1 of 1 customers found this review helpful.
A nicely Designed Knobby Tire

These tires are fairly light for what they are and I've always be attracted to a more conventional knobby, they just work well in the dirt. I found they don't track through slushy snow as well as I wish they did, I'm happy with them in soft dirt and mud. I'm happy I bought them! On my Stan's Valor carbon wheels, the measure 40mm wide which is pretty true to size.

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Mechanic's Corner

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A guide to bicycle tire sizes, both standard on newer bikes and common on older bikes.
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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