Slammer Kachinsky

The Slammer is the perfect first bike. At home in the neighborhood or the skatepark allowing a beginner rider to fit in with their friends without the high price tag.
  • 100% Hi-Ten, Tapered Legs, 31mm Offset
  • GT NBS tires/ Single Wall Rims
  • GT Power Series Cr-Mo 3pc. Cranks
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Shipping Policy

Free shipping on all orders for bikes, apparel, parts & accessories for any order in the United States. 

*Please allow for 5-7 days of transit time as all orders are shipped via ground shipping.

*If an order is placed on Friday, please allow 2-3 days for processing. 

Please reach out to if you have any questions.

Return Policy

Returns are accepted within 30 days of delivery.


  • The bike or part must be in its original packaging to receive a 100% refund.
  •  If product is unused but protective packaging has been removed or has major damage, we will refund 75% of the order.
  • We do not accept returns on apparel.
  • Please allow for 7-10 days to process the return and issue refund.

*Protective packaging includes: foam, cardboard, zip ties, plastic axle covers, warning decals and reflectors.

Please reach out to to start a return.

Contact Us

This bike will come partially assembled. Tools needed for assembly are not included. Please refer to these instructions and build video on how to assemble the bike. This bike is not eligible for the GT Connect build program.

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Built for a rider

Progressive geometry, big soft tires, clean straight cable, railed junior saddle, 8.5” 2pc handlebars and fresh colors

More than just a bike for beginners

The short 20-inch top tube and the responsive geometry is to make it easier for young riders to maneuver while you learn bike control

Brian Kachinsky inspired color and Chicago graphics

Our Slammer bold graphic with a Brain Kachinsky twist. World spot explorer graphics, and BK classic translucent red. A new black and red Chicago classic.


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


rims Alloy Single Wall, 36h
front hub Steel Loose Ball 3/8" Axle
rear hub Alloy Semi-Sealed 14mm Cassette
front tire GT NBS 2.4"
rear tire GT NBS 2.4"
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 American Loose Ball Bearing
pedals GT Logo PC Platform


handlebar GT 2pc Freestyle, 100% Hi-Ten Steel, 8.5"H x 29"W, 3°Up, 11° Back
stem GT NBS Top Load 40mm, 32mm Rise
grips GT Super Soft Flangeless
headset 1-1/8" Threadless, Steel
seatpost Alloy, 25.4mm x 200mm
saddle Railed saddle


brakes NBS Alloy U-Brake w/ Soft Compound Pad
brake levers NBS Alloy
Please note that, based on component availability and other factors, specifications are subject to change without notice.

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"


Sizes (in) One Size
Top tube actual 20
Head tube angle 75 °
Seat tube angle 71 °
Standover 7.87
Head tube length 4
Wheelbase 34.89
Front center 21.85
Chainstay length 13
Bottom bracket height 11.57
Seat post diameter 1
Axel to crown 12.6
Dropouts 14mm
Head tube type A-Headset
Brake mounts Welded
Rider area 21.77
Bottom bracket type American
Fork rake 1.2
Axel to crown 12.6

GT Tech Book

GT Owner's Manual