1988 GT Avalanche Overview

1988 was the first year of GT’s Triple Triangle design. The Karakoram of that year had a full Deore group with the grey cracked paintjob. The Avalanche was the top-of-the-line model with 992 U-brakes front and rear and a Suntour 9010/XCD-6000 mix. with the GT BMX Power Series cranks adapted for a Mtn bike

GT seemd to be going all the way to have a unique MTB for the Avalanche in 1988, they apprently went to Suntour and Dia-Compe  to get custom painted components for the Avalanche.

The Brake levers, UBrakes, Hubs, Headset and Pedals were painted in Anthracite,

Derailuers were painted two tone White/Anthracite along with the shifter bodies were painted White.

They then look to their own product and painted the stem to match and made a few new pieces for their wildly popular “Power Series” Cranks , and made adapters to mount the cranks on a std Square Taper Bottom Bracket along with a new Spider for the triple chainrings. cover all of that in white paint and a unique logo


  • Frame: Tange Prestige 70/74 TIG welded by Toyo with Suntour Drops, Internal routing for R-Brake Cable
  • Fork: Spinner Round-Oval Round tapered blade with socket type Suntour forged ends
  • Bottom Bracket: Hatta Swan sealed mech
  • Brake Levers: Diacompe 290 “Bat Wing” Brake levers (custom painted Anthracite Gray)
  • Brakes: DiaCompe AD992 U Brakes (custom painted Anthracite Gray)
  • Chain: Suntour SP-6000 nickel
  • Chainrings: 48t Round with 38/28T Oval Tech
  • Crank: SR/GT Power Series cold forged (custom painted White)
  • Derailleur, Front: Suntour XC 9010 (custom painted White with Anthracite)
  • Derailleur, Rear: Suntour XC 9000 (custom painted White with Anthracite)
  • Freewheel: Suntour Winner Pro 13-30T 6 speed
  • Grips: GT/Ame
  • Handlebar: SR MT aluminum alloy
  • Head Set: Tange Levin CD sealed mech 1″ (custom painted Anthracite Gray)
  • Hubs: Suntour XC 9000 sealed bearing (custom painted Anthracite Gray)
  • Pedals: Suntour XCD-6000 (custom painted Anthracite Gray)
  • Rims: Araya Rm20 GMG Finish
  • Saddle: GT Pigskin
  • Seat Post: Suntour XC 27.0 x 330mm
  • Shift Levers: Suntour XCD-6000 (lever custom painted Anthracite Gray)
  • Spokes: 14g Stainless 4x
  • Stem: GT logo with internal cable routing (painted same as frame)
  • Tires: Ritchey Force 2.0



1988 GT Mountain Bike Catalog Pages on the Avalanche:


The final production logo’s of the GT Power Series Cranks for the Avalanche