Home > Other Fun Stuff > Advocacy & Industry News > News

Onza Aquila Downhill Tire Bites Back with 29″ x 2.5″ and Taller Knobs

onza aquila dh mtb tire 29" x 2.5" grc trc casing soft compound 50
Support us! Bikerumor may earn a small commission from affiliate links in this article. Learn More

The Onza Aquila, a Downhill Mountain Bike Tire originally dreamed up by none other than Aaron Gwin, has undergone a refresh; the same distinctive tread pattern gets taller knobs, softer rubber, and higher volume casings in the name of delivering more bite, better braking characteristics and improved grip.

onza aquila constellation mid tread
The Onza Aquila is named after the Aquila Constellation, the shape of which is often compared to that of an Eagle; the shape of the constellation is seen periodically in the mid-tread of the tire

Updated Onza Aquila

  • Intention: Downhill, All-Mountain and Enduro Riding
  • Sizing Options: 29″ x 2.5″ and 27.5″ x 2.5″ (63-622 ETRTO)
  • Rubber Compounds: Soft Compound 50
  • Casing Options: TRC; single ply 60 TPI, GRC; dual-ply 120 TPI
  • Starting Price: $84.90 USD
onza aquila tread pattern 2022 version
The Onza Aquila evolved from the Swiss Brand’s faster-rolling IBEX, an all-terrain mountain bike tire with a busier tread pattern

The latest Onza Aquila retains that tread pattern developed by Gwin, only with the knobs increased in height by 20% for improved bite and braking characteristics. The tread has two distinct pairs of center tread blocks The broader pair are bridgeless and feature siping that runs perpendicular to the direction of travel; that improves the knob’s ability to deform in that plane, and also adds a secondary edge for rolling grip and braking, in their respective directions.

The narrower pair is elongated, braced laterally by a shallower bridge. The siping here runs in the direction of travel, increasing the lateral flex of the individual knobs. Both pairs of center tread knobs are ramped in a bid to reduce rolling resistance, but that ramping is far more pronounced on this narrower pair.

onza aquila sie knobs reinforced 45a rubber

At the edge, we see two distinct side knobs, one of which is heavily reinforced laterally with a raised section of rubber at its outermost edge. Altogether, the tread is seems pretty aggressive to my eye.

onza soft compound 50In addition to the switch from 2.4″ to a higher volume 2.5″, the Aquila also gets softer durometer rubber, as measured by the ShoreA hardness. As with all Onza mountain bike tires, the new Aquila is a dual-compound tire. All options across both casing constructions now receive Onza’s softest rubber offering, named Soft Compound 50. That sees 50a rubber at the center tread, and a softer 45a rubber at the side knobs to offer more grip at higher lean angles.

At the center, and at the edge, the rubber durometer is consistent throughout the depth of the blocks, so tackiness shouldn’t deteriorate with wear.


The Aquila is offered in two casing options; GRC for Downhill and Enduro riding, and TRC for Trail and All-Mountain Riding. As one would imagine, the GRC is the heavier of the two by around 200g, weighing a claimed 1250g for the 29″ x 2.5″. It is made up of a dual-ply 120 TPI fabric and boasts an anti-pinch flat protection insert at the sidewalls, in addition to a Nylon reinforcement layer extending from the Kevlar (aramid) bead.

onza trc single ply 60 tpi casing construction

The Onza Aquila TRC in 29″ x 2.5″ weighs a claimed 1050g. Here, Onza has opted for a single-ply of a 60 TPI fabric, foregoing the use of the anti-pinch flat protection insert but retaining the Nylon reinforcement layer.

Pricing & Availability

The 29″ x 2.5″ GRC Casing Onza Aquila, in Black and Skinwall options is available now, retailing at $99.90 and $104.90 USD, respectively.

The 29″ x 2.5″ TRC Casing options are on their way, due sometime this summer. They will set you back $89.90 and $94.90 USD, for the Black and Skinwall, respectively.

The 27.5″ x 2.5″ are available in the GRC casing only. These retail at $89.90 and $94.90 USD for the Black and Skinwall options, respectively, but won’t be available until Winter 2022.

onza aquila black skinwall options


Notify of

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Inline Feedbacks
View all comments

Subscribe Now

Sign up to receive BikeRumor content direct to your inbox.

Subscribe Now

Sign up to receive BikeRumor content direct to your inbox.