
ENVE Twin Bolt Seatpost - 25mm Offset UD Carbon, 25.4mm
25.4mm
Replacement option · verify fit
Velopedia Bicycle Archive
Original specifications: BMX drivetrain · 20" wheels.
Selling this bike? Create a shareable bike record
At a glance
| Frame Construction | TIG-welded |
|---|---|
| Frame Material | Hi-tensile |
| Fork | Norco |
| Fork Material | Unicrown |
| Component Group | BMX |
|---|---|
| Crankset | Tubular chromoly 3-piece, 39 teeth |
| Bottom Bracket | BMX Sealed |
| Cassette | Lida Freewheel |
| Rear Cogs | 1-speed, 14 teeth |
| Chain | KMC Z-410, 1/2 x 1/8" |
| Pedals | Flat alloy |
| Brakes | Tektro 985AFS front/Tektro 907 U-brake rear brakes, Tektro 289 levers |
|---|
| Headset | 1 1/8" threadless Threadless |
|---|---|
| Handlebar | Norco Tron |
| Handlebar Extensions | Not included |
| Stem | Alloy |
| Saddle | Norco BMX |
| Seatpost | Short post, 25.4mm diameter |
| Hubs | Front: Alloy, 3/8" axle, Rear: Alloy, 14mm hollow alxe |
|---|---|
| Rims | Alex Y-22, 36-hole |
| Spokes | Ucp |
| Front Tire | Front: 20 x 2.125" Kenda K-893, Rear: 20 x 1.95 Kenda K-893 |
| Wheel Size | 20" wheels |
Parts & serviceability

25.4mm
Replacement option · verify fit
Based on the original build. Confirm the model, size and fit before ordering; installed parts may differ. As an Amazon Associate I earn from qualifying purchases. Velopedia may also earn from qualifying eBay purchases. Velopedia may also earn from qualifying retailer purchases.
This checklist uses the archived equipment for this bike. It cannot confirm the condition, service history or later component changes of the example in front of you.
Archived: 2009 Norco Rythm · BMX · Published sizes: 20.5" top tube
Archived: Frame: TIG-welded · Fork: Norco · Unicrown
Archived: Group: BMX · Crankset: Tubular chromoly 3-piece, 39 teeth · Bottom bracket: BMX Sealed · Cassette: Lida Freewheel · Rear cogs: 1-speed, 14 teeth · Chain: KMC Z-410, 1/2 x 1/8"
Archived: Brakes: Tektro 985AFS front/Tektro 907 U-brake rear brakes, Tektro 289 levers
Archived: Wheel size: 20" wheels · Rims: Alex Y-22, 36-hole · Hubs: Front: Alloy, 3/8" axle, Rear: Alloy, 14mm hollow alxe · Front tire: Front: 20 x 2.125" Kenda K-893, Rear: 20 x 1.95 Kenda K-893
Archived: Headset: 1 1/8" threadless Threadless · Handlebar: Norco Tron · Stem: Alloy · Seatpost: Short post, 25.4mm diameter · Saddle: Norco BMX · Pedals: Flat alloy
This archive record has limited published detail. Share what would help another rider understand how this model fit, rode and held up over time. Velopedia reviews every contribution before publication.
For privacy, Velopedia shows the same confirmation whether or not an experience exists.
Checking current listings…
Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.