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1,639.00Please note that price can vary per country

A fully rigid steel mountain bike that will become your ultimate go-to

Featuring a redesigned frame, the Thunder is a fully rigid steel mountain bike that will become your ultimate go-to for fun days in the saddle. This capable bike is a simple option, but don’t sell it short, the Thunder is packed with features. From the Chromoly fork with rack or fender mounts and with extra water bottle mounts for your longest adventures to a dropper post will help you tackle whatever obstacles the trails throw your way.

Key Features
  • Fully-butted chromoly frame with tapered headtube, compatible for suspension forks up to 100mm
  • Boost-148 through-axle rear triangle allows for tires up to 29x2.95”/75mm
  • Field- serviceable external derailleur and brake routing
  • Internal dropper seatpost routing
  • Multi-mount bottle system in the front triangle to allow for installation of bottles and half-frame bags

Breezer Compact Geometry

BREEZER COMPACT GEO: Joe created the compact frame geometry with the goal of having the smallest frame possible while using longer-length parts like seatposts so bikes properly fit riders. The benefits were both to save weight and increase stiffness for pedaling by having shorter frame tubes. Before this road frames were traditionally very tall and used short seat posts. This was problematic because the small-diameter steel tubes would flex very easily. Joe’s geometry made the frames much more agile while also offering greater maneuverability both on and off road.

Breeze-In Dropouts

BREEZE-IN DROPOUTS: Joe Breeze’s iconic Breeze-In dropouts offer twice the rigidity and half the weight of standard dropouts; after almost three decades they are still used by custom frame builders to this day. The hooded shape was a breakthrough in design that allowed two major advantages over traditional cast or forged dropouts. First was a much stronger connection between the chainstay & seatstay tubes to the dropout and the second was the ability to save weight by using less material for the forging. Breeze-Ins also enable the tubing length to extend as close as possible to the rear axle and avoid using heavy and stiff CNC yokes or mounting plates keeping the tubing the star of the show and the ride quality as high as possible. Now made for both quick-release and thru-axle applications, Breeze-In dropouts improve shifting, wheel changes, and of course, ride quality.

Breezer Steel

BREEZER STEEL 4130 CROMO: The material Joe started with, and still the staple material for most Breezer bikes. Chromoly tubing has earned its place in cycling’s list of top-rated materials as it offers incredible strength-to-weight properties, up to 5 times the fatigue & tensile strength of 6061 aluminum, while also offering excellent ride quality. Add to this the ability to repair the material after welding and you can understand why adventure riders have trusted this material most to safely carry them around the world for decades.

Multi-Mount Capability

Multi-Mount Capability: A signature feature on all adventure models. Frames and forks come designed with multiple mounting options for racks, fenders and bottle cages. These features allow you to fully customize & personalize your Breezer for the type of riding you love most. Whether it’s loading up with five water bottles to traverse across barren wastelands or outfitting some new waterproof bags on front & rear racks for a weekend bikepacking trip, Breezer has you covered!



  • Shimano Deore 1x12spd with 34t x 10-51 wide range gearing
  • Shimano MT-501 Hydraulic disc brakes
  • WTB Vigilante TCS 29x2.5" tires and ST i23 TCS rims

Technical Specifications

Sizes 15, 17, 19, 20.5
Color(s) Gray w/burnt orange
Frame Breezer custom-butted-chromoly steel, BSA Threaded BB, 148 x 12mm
Fork Chromoly disc, rack / fender & side bottle mounts, 110 x 15mm through-axle
Crankset Shimano 34T
Bottom Bracket Shimano threaded
Pedals N/A
Front Derailleur N/A
Rear Derailleur Shimano 12-speed
Shifters Shimano
Cassette Shimano 10-51T, 12-speed
Chain Shimano
Wheelset WTB 29" ST i30 TCS disc, tubeless compatible, Formula hubs- Boost 148/110mm, SAPIM Leader 14g spokes, 32H
Tires Goodyear Newton v2, Dynamic R/T compound, 61-622", folding bead
Brakeset Shimano MT500 hydraulic disc, 180/160mm rotor
Brake Levers Shimano
Headset FSA 1 1/8", No.42 internal, 36° ACB-sealed, 6.5mm aluminum top cover
Handlebar Breezer Riser Bar, 780mm width, 8° backweep
Stem Breezer, 3D-forged 6061 stem body, 0°
Grips Breezer lock-on
Saddle WTB Volt Comp 142x265, cromo rail
Seatpost KS RAGE-i, 30.9mm diameter
Weight tbd
*Specifications subject to change without notice


Size S M L XL
Bike Size(in) 15 17 19 20.5
A Seat Tube, Center to Top 370 420 470 521
C Top Tube, Effective 585 610 635 666
D Head Tube Length 100 100 120 130
E Seat Tube Angle 75° 74.5° 74° 74°
G Head Tube Angle 67.7° 67.7° 67.7° 67.7°
H Chainstay Length 450 450 450 450
I Wheelbase 1136 1162 1177 1209
J Bottom Bracket Drop 72 70 70 70
K Fork Offset 46 46 46 46
M Stack 610 609 627 632
N Reach 421 441 455 484
O Standover 765.5 785.5 811.5 839.3
Stem mm 45 45 45 65
Handlebar Width cm 780 780 780 780
Crank mm 170 175 175 175
Wheel Size 29 29 29 29
Seat Post Diameter mm 30.9 30.9 30.9 30.9

This model features: Compact Geometry

Joe created the compact frame with the goal of having as small of frame possible while using longer-length parts like seatposts and stems to allow the bikes to properly fit riders. The benefit was both to save weight and increase stiffness for pedaling by having shorter frame tubes.
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