![GT Wise 21″ BMX Bike [Green] (2017)](https://www.urbnbike.com/wp-content/uploads/2025/9/1758958724/gt-wise-21-bmx-bike-green-2017-1758958728.webp)
Effortless style! The Wise Team has a classic, long-last look.FEATURES:Cr-Mo Front TriangleGT Pivotal SeatGT Pool TiresSPECIFICATIONS: Sizes:20" wheel / 20.75" top tubeFrame:Revamped, Cr-Mo Front Tri (T/T, D/T, S/T), DT Gusset, Integrated Seat Clamp, MID B
Effortless style! The Wise Team has a classic, long-last look.
| Sizes: | 20″ wheel / 20.75″ top tube |
| Frame: | Revamped, Cr-Mo Front Tri (T/T, D/T, S/T), DT Gusset, Integrated Seat Clamp, MID BB, Integrated H/T w/ Removable Tabs, Seatstay welded brake mounts |
| Fork: | Revamped, Cr-Mo 2pc Threaded Steerer, Tapered Legs, 3/8″ Axle x 31mm Offset |
| Chain: | KMC Z410 |
| Crankset Chainwheel: | 15 |
| Crank: | GT Power Series Cr-Mo 170mm 3pc, 19mm x 8T Cr-Mo Spindle, GT 5mm 25T AL Chainwheel |
| Crank Option 1: | GT Power Series Cr-Mo 170mm 3pc, 19mm x 8T Cr-Mo Spindle, GT 5mm 25T AL Chainwheel |
| Bottom Bracket: | Sealed MID |
| Pedals: | GT Low Profile Platform, Cr-Mo Axle |
| Rims: | Alloy Single Wall (F), Double Wall, (R) 20″ 36 Hole |
| Tires: | GT Pool 20″ x 2.3″ Front, Rear |
| Hubs: | GT, Alloy, 36H (F) 3/8″ Sealed, (R) 9T Sealed 14mm Cassette |
| Brake: | Aluminum U-Brake |
| Brake Levers: | Alloy |
| Handlebar: | GT Freestyle 2pc., Steel, 9″H x 29″W, 3?Up, 11? Back |
| Stem: | GT Topload, 32mm Rise, 50mm Length |
| Grips: | GT Super Soft 155mm, w/o Flange, w/ GT plug |
| Headset: | 1 1/8″ Integrated, 45×45 Degree Sealed Bearings |
| Saddle: | GT Pivotal Padded |
| Seat Post: | Alloy Pivotal 25.4 x 200mm |
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