The Onza Allegra X4 is a fast-rolling gravel tire built for riders who want to carry speed on rough gravel without giving up cornering grip. Its compact center tread keeps rolling resistance in check, while the more pronounced shoulder knobs and open tread transitions help the tire hold its line through loose corners and clear debris. The result is a race-oriented gravel tire for fast dirt roads and demanding mixed-surface rides.
Key Features
Compact center tread balances rolling speed with traction on gravel
Pronounced shoulder knobs provide grip when cornering on loose surfaces
Open transitions between center and shoulder tread help shed dirt
120 TPI casing balances flexibility with durability
Folding Kevlar bead keeps weight down
Tubeless-ready construction supports tubeless setup with compatible wheels and sealant
Available in black or tanwall
Who It's For The Allegra X4 is for gravel riders who push the pace on dirt roads, race courses, and mixed terrain where cornering confidence matters as much as rolling speed. It offers more bite than a semi-slick tire for loose gravel and fast turns, without the heavier, more open tread of a tire built primarily for rough trails.
Specifications & Identifiers
Color
Black, Black/Tan
Defined Color
Black
Designed for ebike
No
Flat Protection
None
Intended Use
Gravel
ISO Diameter
622 / road / 29"
ISO Width
40mm
Labeled Size
700x40
Tire Bead
Folding
Tire Diameter
700c
Tire Type
Tubeless Ready
TPI
120
Weight
515g
Black - 700x40c EAN
7640174051021
Black - 700x40c MPN
A1525400
Black/Tan - 700x40c EAN
7640174051038
Black/Tan - 700x40c MPN
A1525401
Tree Fort ID:
333222478177
Have Experience With This?
or
Customer Questions
not logged-in log-in to receive an emailed response