Details
START THEM STRONG
Built as an easy first step into off-road riding, the Cascade 20 gives young riders a stable, confidence-building platform. Its lightweight AL6 aluminum frame and compact geometry make handling simple, controlled, and fun from the very first ride.
SMOOTH OVER EVERY BUMP
A 40mm coil suspension fork smooths out rough paths, curbs, and light trails. Tuned for lighter riders, it adds comfort without feeling heavy or overbuilt, keeping control predictable on mixed terrain.
SIMPLE, RELIABLE CONTROL
A 1x7 Shimano Tourney drivetrain keeps shifting intuitive and easy, while Tektro mechanical disc brakes deliver consistent stopping power. Durable wheels and grippy tires ensure dependable performance for everyday riding.
Specs
| frameset | |
|---|---|
| Frame | AL6 Aluminium Rigid Frame, Internal Cable Routing (Front), IS Disc Mount 160mm, Threaded BSA 68mm Bottom Bracket, Rear Spacing 135mm (M10), 31.8mm Seat Clamp, Kickstand Mount (Bolt-On Centre Chainstay) |
| Headset | Zero Stack Headset, ZS44/28.6 | ZS44/30, Caged Bearings |
| suspension | |
| Fork | Suspension Fork, 40mm Travel, Coil Spring, Alloy Crown & Lowers, Straight 1-1/8" Threadless Steerer, Post Mount Disc 160mm, QR 9x100mm Spacing |
| drivetrain | |
| Rear derailleur | Shimano Tourney TY200, 7-Speed |
| Shifter | Shimano Tourney Revo Shifter, 1x7-Speed |
| Crank | Alloy Crankset, 110mm Crank Arm Length, Square Taper Interface |
| Chainring | 30T |
| Cassette | 7-Speed Freewheel, 14–28T |
| Chain | Meile M70 |
| brakes | |
| Front brake | Tektro M280 Mechanical Disc Brake |
| Rear brake | Tektro M280 Mechanical Disc Brake |
| Rotor | Tektro TR160-52, 160mm Front & Rear |
| wheels | |
| Front hub | Alloy Hub, 32H, QR 9x100mm |
| Rear hub | Alloy Hub, 32H, QR 10x135mm |
| Rim | 20" Alloy Double Wall Rims, 32H, 20mm Height, 21mm Internal Width |
| Tyre | Kenda K1047, 20x1.95" |
| Max tyre size | 20x1.95" |
| contact points | |
| Handlebar | Steel Handlebar, 560mm Width, 25.4mm Clamp, 7° Rise, 6° Backsweep |
| Grips | Standard Rubber Grips |
| Saddle | Youth Saddle, Steel Rail 7mm |
| Seatpost | Steel Seatpost, 27.2x300mm |
| Stem | Alloy Stem, 40mm Length, 25.4mm Clamp |
| Pedals | One-Piece PP Body Pedals |
| weight | |
| Bike weight | 25 lbs |
| accessories | |
| Kick stand | Included |
Geo
| Riders Height | 3'7" to 4'5" |
| (A) Stack | 454 |
| (B) Reach | 305 |
| (C) Head Tube Angle | 70 |
| (D) Head Tube Length | 100 |
| (E) Seat Tube Angle | 72 |
| Seat Tube Angle Effective | 72 |
| (F) Seat Tube Length | 254 |
| (G) Top Tube Effective | 453 |
| (H) Bottom Bracket Height | 215 |
| (I) Bottom Bracket Offset | -42.5 |
| (J) Chainstay | 350 |
| (K) Wheel Base | 844.8 |
| (L) Standover Height | 476 |
| Crank Arm Length | 110 |
| Hbar Width | 560 |
| Stem Length | 40 |
* All lengths in mm
** Realistic standover height measured at 3 o'clock pedal position
Build
2024 Polygon Premiere 20 XC
Your bike needs minor assembly before riding; use the tools and videos included.
As a guide, it'll take 10-40min depending on whether you're an experienced bike assembler or have little to no mechanical experience.
Side Note: Your cables will stretch during the initial bed-in period and must be adjusted by an experienced mechanic around 150km of riding.
Unboxing Your Bike
Bike Fit Setup
Tyre Pressure Setup