Bicycle Archive · Specification report

1997 Giant ATX 870

Velopedia Archive ID 63670

Overview

Model year	1997
Brand	Giant
Model	ATX 870
Bicycle type	Mountain bike, front suspension
Archive ID	63670
Original MSRP	$1,029.95
Colors	Ball burnished/blue slate fade, green kandy
Sizes	14.5", 17.5", 19.5", 21.5", 23.5"
Weight	26.3 lb

Frameset

Frame construction	TIG-welded
Frame material	Giant CU92 aluminum, butted
Fork	Rock Shox Indy XC
Fork material	Magnesium, triple-clamp crown
Rear shock	N/A

Drivetrain

Component group	Shimano Deore LX/STX-RC
Shifters	Shimano STX-RC RapidFire SL
Front derailleur	Shimano Deore LX top-swing, top-pull/clamp-on 35.0 mm
Rear derailleur	Shimano Deore LX SGS
Crankset	Shimano STX-RC, 22/34/42 teeth
Bottom bracket	Shimano BB-UN52, 110.5 mm spindle
BB shell width	68mm English
Rear cogs	8-speed, 11 - 28 teeth
Chain	Sachs SC-20, 1/2 x 3/32"
Pedals	Giant EXT-Comp aluminum w/clips & straps

Brakes

Brakes	Shimano Deore LX V-Brake brakes, Shimano Deore LX levers

Cockpit & contact points

Headset	1 1/8" threadless Dia-Compe Aheadset TA-3
Handlebar	Aluminum
Handlebar extensions	Not included
Stem	Direct Connect aluminum
Saddle	Selle San Marco Tecno Dynamica
Seatpost	Kalloy SP-243, 30.8 mm diameter

Wheels & tires

Hubs	Front: Shimano STX-RC suspension, Rear: Shimano STX-RC
Rims	Rigida Norma, 32-hole
Spokes	DT stainless steel, 2.0mm straight gauge
Spoke nipples	Brass nipples
Front tire	Front: 26 x 1.95" Tioga Edge kevlar, Rear: 26 x 1.95" Tioga Psycho TT kevlar
Wheel size	26" wheels

Geometry · Legacy reference

Top tube	574 mm
Head-tube angle	71.3°
Seat-tube angle	73°
Chainstay / rear center	425.4 mm
Wheelbase	1038.9 mm
Fork offset / rake	40.6 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on August 25, 2026.