Bicycle Archive · Specification report

1998 Spit Underdog 4130

Velopedia Archive ID 77364

Overview

Model year	1998
Brand	Spit
Model	Underdog 4130
Bicycle type	BMX
Archive ID	77364
Original MSRP	$480.00
Sizes	Pro, Pro XL

Frameset

Frame construction	TIG-welded
Frame material	4130 chromoly
Fork	SE Racing Landing Gear
Fork material	4130 chromoly, unicrown crown
Rear shock	N/A

Drivetrain

Component group	N/A
Shifters	N/A
Front derailleur	N/A
Rear derailleur	N/A
Crankset	1-piece chromoly
Bottom bracket	Odyssey
BB shell width	American
Rear cogs	1-speed, 17 teeth
Chain	KMC, 1/2 x 3/32"
Pedals	DK Speed Racer

Brakes

Brakes	Shimano DX BMX V-brake rear brakes, Shimano DX BMX levers

Cockpit & contact points

Headset	1 1/8" threadless Aheadset
Handlebar	DK Pro
Handlebar extensions	N/A
Stem	DK XL
Saddle	Serfas kevlar
Seatpost	DK aluminum, 22.2mm (7/8 inch) diameter

Wheels & tires

Hubs	Dk
Spokes	Steel, straight gauge
Front tire	Front: 20 x 2.125", Rear: 20 x 1.75"
Wheel size	20" wheels

Geometry · Legacy reference

Top tube	520.7 mm
Head-tube angle	73°
Seat-tube angle	70°
Chainstay / rear center	381 mm
Wheelbase	965.2 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on October 12, 2026.