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Challenge Tires Almanzo Pro Open Tubular Gravel Tire

5.00 out of 5 2 customer reviews

61,98 Vat Included50,80 Vat Free

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A highly effective gravel tire from Challenge. With it’s Open Tubular construction, two layers of puncture protection and 33mm tyre width, grip is superb and performance is great. Stick to the gravel, ride faster over the gravel – this tire does this.


  • Puncture protection strip x2( PPS2)
  • Open tubular construction (handmade)
  • Highly supple tire
  • Top quality, high-TPI casing materials and natural rubbers
Technical details
Use:Hard-Packed Dirt, Light Gravel
Internal Rim Width:15-19mm
Puncture protection:Double PPS
What's an open tubular?

An open tubular is constructed using the same casing and tread materials and process as a tubular, but instead of sewing the casing together (closed), the sides of the tubular casing are folded around aramid fiber cords to produce beads. This ‘open’ design performs like a tubular, yet conveniently mounts like a standard clincher tire.
If combined with a latex inner tube the ride becomes even closer to that of a tubular, offering excellent traction and cornering, low rolling resistance and shock absorption.

Terms and conditions

All “Challenge Tires“ products are generally in stock with orders completed within 1-2 business days. If products require longer delivery times it will be indicated in the order and is based on the information provided to us by Challenge Tires.

Payments are only accepted in EUR € currency.
Prices displayed will have VAT tax added where applicable. Customers located outside of the European Union are not subject to VAT.
It is possible to pre-order all items in our catalog that are currently out-of-stock. Delivery times automatically displayed on out-of-stock items by our online shop may differ slightly based on the articles selected and the information provided to at that time by suppliers. offers a free return policy within 15 days of receiving the item. All products must be returned in the original packaging and with original labels. Items cannot be worn or used before returning. Any items that are returned without original packaging or labels, or is not in original condition will not be accepted.
Shipping on exchanged items is free of charge.
Every product sold by is covered by the manufacturer's warranty.

Estimated Delivery Times by Courier
CourierDHLUPS StandardUPS ExpeditedDPD - BRTPoste Italiane - EMS
Shipping times do not include possible delays due to customs. We offer several shipping services available, with different rates and delivery times. During check-out you may select your preferred method of shipment.

Every shipment is fully covered by insurance (free of charge) against lost or damaged items. A tracking number will be provided with each shipment.


2 reviews for Almanzo Pro Open Tubular Gravel Tire

  1. Rated 5 out of 5

    Morten (verified owner)

    I bought these for winter riding here in Scandinavia, where most roads are wet and full of debris from October till March. The Almanzo is now wider at 33mm but that makes for an even more versatile tyre for offroad use in my local woods and backcountry roads. I cannot vouch for the puncture resistance yet, but they seem very solid while still reasonably light and I have high hopes that they will outperform what I have been riding up until now.

  2. Rated 5 out of 5


    After 1 year of riding gravel races, unpaved roads, MTB single tracks and alikes i’m totally sold on these tyres. Super versatile, with a good grip in dry or slightly wet conditions. In the heavy mud they tend to surf it but you’re not supposed to use them there! Zero punctures so far!

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