Performer 20.5 Kachinsky

The Performer is a solid intermediate model with a combination of reliable spec and affordability. Two top tube options (20.5 & 21) make this an ideal bike for both beginner and returning BMX riders.
  • GT Pivotal Padded Saddle / Alloy Pivotal Post
  • Sealed Alloy Front Hub/ Double Wall Rear Rim
  • GT Power Series Cr-Mo 3pc. Cranks
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Reliable spec for beginner to intermediate riders

Rolling on GT LP-5 tires, double wall rear wheel, and sealed front hub

GT Kachinsky Pivotal Saddle

Featuring a debossed Chicago train map and white marble accent panel.

Brian Kachinsky inspired color and Chicago graphics

Graphics are inspired by Brian’s love to travel and explore the cities of the world. Black is the color of asphalt and the yellow a mark of the best street spots


frame 100% Hi-Ten Steel Tubes, DT Gusset, Mid BB, Seat Stay U-Brake, Integrated 1-1/8" H/T, Removable Rotor Tabs
sizes available 20.5
fork 100% Hi-Ten, Tapered Legs, 31mm Offset
wheel size 20


rims Alloy Single Wall (F), Double Wall (R), 36h
front hub Alloy Sealed 3/8" Axle
rear hub Alloy Semi-Sealed 14mm Cassette
front tire GT LP-5 2.35"
rear tire GT LP-5 2.35"
spokes Stainless Steel, 14g


rear cogs 9T 1pc. Driver
chain KMC S1
crank GT Power Series 3pc Chromoly 170mm, 19mm x 8T Spindle, GT NBS 25T Steel Chainwheel
bottom bracket Sealed Mid 19mm
pedals GT Logo PC Platform


handlebar GT 2pc Freestyle, 100% Hi-Ten Steel, 9"H x 29"W, 3°Up, 11° Back
stem GT NBS Top Load 50mm, 32mm Rise
grips GT Super Soft Flangeless
headset 1-1/8" Sealed Integrated (41.8 x 45)
seatpost Alloy Pivotal, 25.4 x 200mm
saddle GT Pivotal Padded


brakes NBS Alloy U-Brake w/ Soft Compound Pad
brake levers NBS Alloy


Sizes (in) 20.5
Top tube actual 20.5
Head tube angle 75° °
Seat tube angle 71° °
Standover 8.5
Head tube length 4.5
Wheelbase 35.41
Front center 22.41
Chainstay length 13
Bottom bracket height 11.75
Seat post diameter 1
Axel to crown 12.6
Dropouts 14mm
Head tube type Integrated
Brake mounts Welded
Rider area 22.16
Bottom bracket type Mid
Fork rake 1.2
Axel to crown 12.6

Fit Guide

2'10" - 3'7"
3'1" - 3'7"
3'7" - 4'0"
4'0" - 4'10"
4'10" - 6'5"
4'10" - 6'5"
4'10" - 6'5"
4'10" - 6'5"

GT Tech Book

GT Owner's Manual