GT Grade Alloy

Frame

Grade Alloy

Specifications

Manufacturer
GT
Name
Grade Alloy
Discipline
Gravel
Material
Aluminum
Head Tube
Tapered
Upper S.H.I.S
IS42/28.6
Lower S.H.I.S
IS52/40
Max Tyre Width (mm)
45
Seatpost Diameter (mm)
27.2
Wheel Sizes
700c / 29"
Frame Size
XS, S, M, L, XL
Rear Axle Standard
12 × 142 mm
Rear Derailleur Mount
Standard Hanger[1]
BB Standard
BSA THREADED
BB Thread Type
BSA (English)
Disc Brake Mount
Flat Mount
Front Derailleur Mount
Band-On
Cable Routing
Internal
Max Chainring Size (T)
42
Sources
  1. [1] derailleurhanger.com, checked 17 Aug 2026: Rear Derailleur Mount

Compatibility

GT Grade Alloy is a GT gravel frame. Everything listed below was matched on a specification we hold for both parts: the interface each pairing actually depends on, such as freehub body, speed count, actuation or mounting standard. Where we could not verify that interface, the part is left out rather than assumed to fit.

Brake calipers this frame mounts20

2-PISTON FLAT MOUNT BRAKE CALIPERMechanically compatible

Shimano

2-PISTON FLAT MOUNT BRAKE CALIPER

  • Both use a flat mount disc brake
Apex 1 Hydraulic Disc BrakeMechanically compatible

SRAM

Apex 1 Hydraulic Disc Brake

  • Both use a flat mount disc brake
Apex Disc BrakeMechanically compatible

SRAM

Apex Disc Brake

  • Both use a flat mount disc brake
Brake Caliper (BR-R03A-140R)Mechanically compatible

LTWOO

Brake Caliper (BR-R03A-140R)

  • Both use a flat mount disc brake
Brake Caliper (BR-R03B-140R)Mechanically compatible

LTWOO

Brake Caliper (BR-R03B-140R)

  • Both use a flat mount disc brake
Brake Caliper (BR-R04A-160F)Mechanically compatible

LTWOO

Brake Caliper (BR-R04A-160F)

  • Both use a flat mount disc brake
Brake Caliper (BR-R04B-160F)Mechanically compatible

LTWOO

Brake Caliper (BR-R04B-160F)

  • Both use a flat mount disc brake
Brake Caliper (BR-R06A-140F)Mechanically compatible

LTWOO

Brake Caliper (BR-R06A-140F)

  • Both use a flat mount disc brake
Brake Caliper (BR-R06B-140F)Mechanically compatible

LTWOO

Brake Caliper (BR-R06B-140F)

  • Both use a flat mount disc brake
Brake Caliper (BR-R07A-160R)Mechanically compatible

LTWOO

Brake Caliper (BR-R07A-160R)

  • Both use a flat mount disc brake
Brake Caliper (BR-R07B-160R)Mechanically compatible

LTWOO

Brake Caliper (BR-R07B-160R)

  • Both use a flat mount disc brake
EVO X2 FLATMOUNTMechanically compatible

Hope

EVO X2 FLATMOUNT

  • Both use a flat mount disc brake
Force Aero Disc BrakeMechanically compatible

SRAM

Force Aero Disc Brake

  • Both use a flat mount disc brake
RA7800 Hydraulic Brake Caliper Set (Road/Gravel)Mechanically compatible

WheelTop

RA7800 Hydraulic Brake Caliper Set (Road/Gravel)

  • Both use a flat mount disc brake
Red Aero Disc BrakeMechanically compatible

SRAM

Red Aero Disc Brake

  • Both use a flat mount disc brake
Rival 1 HRD DiscMechanically compatible

SRAM

Rival 1 HRD Disc

  • Both use a flat mount disc brake
Rival Aero Disc BrakeMechanically compatible

SRAM

Rival Aero Disc Brake

  • Both use a flat mount disc brake
RX4 SL FMMechanically compatible

Hope

RX4 SL FM

  • Both use a flat mount disc brake
105 FRONT BRAKE CALIPERMechanically compatible

Shimano

105 FRONT BRAKE CALIPER

  • Both use a flat mount disc brake
105 HYDRAULIC DISC BRAKE FRONT CALIPERMechanically compatible

Shimano

105 HYDRAULIC DISC BRAKE FRONT CALIPER

  • Both use a flat mount disc brake

Bottom brackets for this frame shell20

878Mechanically compatible

Token

878

  • Both are bsa threaded bottom bracket shells
BB29BSAMechanically compatible

Token

BB29BSA

  • Both are bsa threaded bottom bracket shells
BB386 crank to BSA frame thread Ceramic bearingsMechanically compatible

FSA

BB386 crank to BSA frame thread Ceramic bearings

  • Both are bsa threaded bottom bracket shells
BB392 crank to BSA frameMechanically compatible

FSA

BB392 crank to BSA frame

  • Both are bsa threaded bottom bracket shells
BB392BSAMechanically compatible

Token

BB392BSA

  • Both are bsa threaded bottom bracket shells
BSA Bottom Bracket (Shimano 24mm)Mechanically compatible

Cybrei

BSA Bottom Bracket (Shimano 24mm)

  • Both are bsa threaded bottom bracket shells
BSA Bottom Bracket (SRAM DUB)Mechanically compatible

Cybrei

BSA Bottom Bracket (SRAM DUB)

  • Both are bsa threaded bottom bracket shells
CARTRIDGE BOTTOM BRACKETMechanically compatible

Shimano

CARTRIDGE BOTTOM BRACKET

  • Both are bsa threaded bottom bracket shells
DEORE XT THREADED BOTTOM BRACKET 68/73 MM SHELL WIDTH (BB-MT800)Mechanically compatible

Shimano

DEORE XT THREADED BOTTOM BRACKET 68/73 MM SHELL WIDTH (BB-MT800)

  • Both are bsa threaded bottom bracket shells
DEORE XT THREADED BOTTOM BRACKET 68/73 MM SHELL WIDTH (BB-MT801)Mechanically compatible

Shimano

DEORE XT THREADED BOTTOM BRACKET 68/73 MM SHELL WIDTH (BB-MT801)

  • Both are bsa threaded bottom bracket shells
DUB-BSAMechanically compatible

Praxis

DUB-BSA

  • Both are bsa threaded bottom bracket shells
ISO Square Taper (BSA / ISO)Mechanically compatible

Token

ISO Square Taper (BSA / ISO)

  • Both are bsa threaded bottom bracket shells
JIS Square Taper (BSA / JIS)Mechanically compatible

Token

JIS Square Taper (BSA / JIS)

  • Both are bsa threaded bottom bracket shells
M24 – BSA THREADEDMechanically compatible

Praxis

M24 – BSA THREADED

  • Both are bsa threaded bottom bracket shells
Mega Exo Comet crank to 68/73mm frameMechanically compatible

FSA

Mega Exo Comet crank to 68/73mm frame

  • Both are bsa threaded bottom bracket shells
MegaExo Comet crank to BSA 100mmMechanically compatible

FSA

MegaExo Comet crank to BSA 100mm

  • Both are bsa threaded bottom bracket shells
MegaExo crankMechanically compatible

FSA

MegaExo crank

  • Both are bsa threaded bottom bracket shells
MegaExo Gamma Drive crank to BSA frameMechanically compatible

FSA

MegaExo Gamma Drive crank to BSA frame

  • Both are bsa threaded bottom bracket shells
MegaExo GOSSAMER crank to BSA frame Di2 compatibleMechanically compatible

FSA

MegaExo GOSSAMER crank to BSA frame Di2 compatible

  • Both are bsa threaded bottom bracket shells
MegaExo K-Force crank to BSA 68/73mm frameMechanically compatible

FSA

MegaExo K-Force crank to BSA 68/73mm frame

  • Both are bsa threaded bottom bracket shells

Seatposts for this seat tube20

AFTERBURNER seatpostMechanically compatible

FSA

AFTERBURNER seatpost

  • Both are 27.2mm
Classic 2-Bolt SeatpostMechanically compatible

Ritchey

Classic 2-Bolt Seatpost

  • Both are 27.2mm
Classic Zero SeatpostMechanically compatible

Ritchey

Classic Zero Seatpost

  • Both are 27.2mm
Coast Suspension Dropper PostMechanically compatible

PNW Components

Coast Suspension Dropper Post

  • Both are 27.2mm
Comp 2-Bolt SeatpostMechanically compatible

Ritchey

Comp 2-Bolt Seatpost

  • Both are 27.2mm
Comp Carbon 2-Bolt SeatpostMechanically compatible

Ritchey

Comp Carbon 2-Bolt Seatpost

  • Both are 27.2mm
Comp Carbon Zero SeatpostMechanically compatible

Ritchey

Comp Carbon Zero Seatpost

  • Both are 27.2mm
Comp Trail Zero SeatpostMechanically compatible

Ritchey

Comp Trail Zero Seatpost

  • Both are 27.2mm
Comp Zero SeatpostMechanically compatible

Ritchey

Comp Zero Seatpost

  • Both are 27.2mm
Cross 25mm SeatpostMechanically compatible

Deda Elementi

Cross 25mm Seatpost

  • Both are 27.2mm
Discover Carbon SeatpostMechanically compatible

PRO

Discover Carbon Seatpost

  • Both are 27.2mm
Discover SeatpostMechanically compatible

PRO

Discover Seatpost

  • Both are 27.2mm
Duncan 2.0 Seatpost 15mm OffsetMechanically compatible

Syncros

Duncan 2.0 Seatpost 15mm Offset

  • Both are 27.2mm
Duncan SL Seatpost 10mm OffsetMechanically compatible

Syncros

Duncan SL Seatpost 10mm Offset

  • Both are 27.2mm
Duncan SL Seatpost 25mm OffsetMechanically compatible

Syncros

Duncan SL Seatpost 25mm Offset

  • Both are 27.2mm
E20 iMechanically compatible

KS

E20 i

  • Both are 27.2mm
EA50 SeatpostMechanically compatible

Easton

EA50 Seatpost

  • Both are 27.2mm
EA70 Seatpost (20mm Setback)Mechanically compatible

Easton

EA70 Seatpost (20mm Setback)

  • Both are 27.2mm
EA70 Seatpost (Zero Setback)Mechanically compatible

Easton

EA70 Seatpost (Zero Setback)

  • Both are 27.2mm
EA90 ISA Seatpost (20mm Setback)Mechanically compatible

Easton

EA90 ISA Seatpost (20mm Setback)

  • Both are 27.2mm

Headsets for this head tube20

110 Ceramic IS42/28.6 / IS52/40Mechanically compatible

Cane Creek

110 Ceramic IS42/28.6 / IS52/40

  • The upper cup is a IS42 fit
  • The lower cup is a IS52 fit
110 IS42/28.6 / IS52/40Mechanically compatible

Cane Creek

110 IS42/28.6 / IS52/40

  • The upper cup is a IS42 fit
  • The lower cup is a IS52 fit
DropSet 2Mechanically compatible

Chris King

DropSet 2

  • The upper cup is a IS42 fit
  • The lower cup is a IS52 fit
DropSet 5Mechanically compatible

Chris King

DropSet 5

  • The upper cup is a IS42 fit
  • The lower cup is a IS52 fit
Fifty IS42/28.6 / IS52/40Mechanically compatible

Cane Creek

Fifty IS42/28.6 / IS52/40

  • The upper cup is a IS42 fit
  • The lower cup is a IS52 fit
Forty IS42/28.6 / IS52/40Mechanically compatible

Cane Creek

Forty IS42/28.6 / IS52/40

  • The upper cup is a IS42 fit
  • The lower cup is a IS52 fit
Hellbender 70 IS42/28.6 / IS52/40Mechanically compatible

Cane Creek

Hellbender 70 IS42/28.6 / IS52/40

  • The upper cup is a IS42 fit
  • The lower cup is a IS52 fit
Hellbender 70 Lite IS42/28.6 / IS52/40Mechanically compatible

Cane Creek

Hellbender 70 Lite IS42/28.6 / IS52/40

  • The upper cup is a IS42 fit
  • The lower cup is a IS52 fit
Hellbender 70 Slam IS42/28.6 / IS52/40Mechanically compatible

Cane Creek

Hellbender 70 Slam IS42/28.6 / IS52/40

  • The upper cup is a IS42 fit
  • The lower cup is a IS52 fit
iRiX IS42/IS52Mechanically compatible

Industry Nine

iRiX IS42/IS52

  • The upper cup is a IS42 fit
  • The lower cup is a IS52 fit
Premium IS Headset - Integrated Standard - IS42/28.6 / IS52/40Mechanically compatible

Wolf Tooth

Premium IS Headset - Integrated Standard - IS42/28.6 / IS52/40

  • The upper cup is a IS42 fit
  • The lower cup is a IS52 fit
IS42/28.6 Upper CupShares a standard

Acros

IS42/28.6 Upper Cup

  • The upper cup is a IS42 fit
IS52 Lower CupShares a standard

Acros

IS52 Lower Cup

  • The lower cup is a IS52 fit
IS52/30 Lower CupShares a standard

Acros

IS52/30 Lower Cup

  • The lower cup is a IS52 fit
IS52/40 Lower CupShares a standard

Acros

IS52/40 Lower Cup

  • The lower cup is a IS52 fit
Classic Integrated IS Upper HeadsetShares a standard

Ritchey

Classic Integrated IS Upper Headset

  • The upper cup is a IS42 fit
Comp Integrated IS Lower HeadsetShares a standard

Ritchey

Comp Integrated IS Lower Headset

  • The lower cup is a IS52 fit
MK0 IS Headset - Integrated Standard - IS42/28.6 UpperShares a standard

Wolf Tooth

MK0 IS Headset - Integrated Standard - IS42/28.6 Upper

  • The upper cup is a IS42 fit
Premium IS52 Aero Headset for Semi-Internal RoutingShares a standard

Wolf Tooth

Premium IS52 Aero Headset for Semi-Internal Routing

  • The lower cup is a IS52 fit
Premium IS52 Internal Aero Headset for ENVE IN-Route SystemShares a standard

Wolf Tooth

Premium IS52 Internal Aero Headset for ENVE IN-Route System

  • The lower cup is a IS52 fit

Forks with a matching steerer and wheel size20

29er Full Carbon Rigid Mtb Plus ForkMechanically compatible

LightCarbon

29er Full Carbon Rigid Mtb Plus Fork

  • Both use a tapered 1-1/8" to 1.5" steerer
  • Both are built for 700c wheels
700C Disc Brake CX Fork Gravel Carbon ForkMechanically compatible

LightCarbon

700C Disc Brake CX Fork Gravel Carbon Fork

  • Both use a tapered 1-1/8" to 1.5" steerer
  • Both are built for 700c wheels
700C Disc Brake Gravel Carbon Fork Aero Gravel Bike ForkMechanically compatible

LightCarbon

700C Disc Brake Gravel Carbon Fork Aero Gravel Bike Fork

  • Both use a tapered 1-1/8" to 1.5" steerer
  • Both are built for 700c wheels
700C Disc Brake Gravel Carbon Fork Racing Gravel ForkMechanically compatible

LightCarbon

700C Disc Brake Gravel Carbon Fork Racing Gravel Fork

  • Both use a tapered 1-1/8" to 1.5" steerer
  • Both are built for 700c wheels
Allroad ForkMechanically compatible

Deda Elementi

Allroad Fork

  • Both use a tapered 1-1/8" to 1.5" steerer
  • Both are built for 700c wheels
BelvaMechanically compatible

Formula

Belva

  • Both use a tapered 1-1/8" to 1.5" steerer
  • Both are built for 700c wheels
Bomber ZMechanically compatible

Marzocchi

Bomber Z

  • Both use a tapered 1-1/8" to 1.5" steerer
  • Both are built for 700c wheels
Bomber Z1Mechanically compatible

Marzocchi

Bomber Z1

  • Both use a tapered 1-1/8" to 1.5" steerer
  • Both are built for 700c wheels
Bomber Z1 CoilMechanically compatible

Marzocchi

Bomber Z1 Coil

  • Both use a tapered 1-1/8" to 1.5" steerer
  • Both are built for 700c wheels
Bomber Z1 E-OptimizedMechanically compatible

Marzocchi

Bomber Z1 E-Optimized

  • Both use a tapered 1-1/8" to 1.5" steerer
  • Both are built for 700c wheels
Bomber Z2Mechanically compatible

Marzocchi

Bomber Z2

  • Both use a tapered 1-1/8" to 1.5" steerer
  • Both are built for 700c wheels
Bomber Z2 E-OptimizedMechanically compatible

Marzocchi

Bomber Z2 E-Optimized

  • Both use a tapered 1-1/8" to 1.5" steerer
  • Both are built for 700c wheels
Cutthroat Carbon ForkMechanically compatible

Salsa

Cutthroat Carbon Fork

  • Both use a tapered 1-1/8" to 1.5" steerer
  • Both are built for 700c wheels
Firestarter Carbon ForkMechanically compatible

Salsa

Firestarter Carbon Fork

  • Both use a tapered 1-1/8" to 1.5" steerer
  • Both are built for 700c wheels
🚲Mechanically compatible

Lauf

Grit

  • Both use a tapered 1-1/8" to 1.5" steerer
  • Both are built for 700c wheels
🚲Mechanically compatible

Lauf

Grit SL

  • Both use a tapered 1-1/8" to 1.5" steerer
  • Both are built for 700c wheels
JOSH BRYCELAND SELVAMechanically compatible

Formula

JOSH BRYCELAND SELVA

  • Both use a tapered 1-1/8" to 1.5" steerer
  • Both are built for 700c wheels
Pista LeggeraMechanically compatible

Columbus

Pista Leggera

  • Both use a tapered 1-1/8" to 1.5" steerer
  • Both are built for 700c wheels
RC32 29Mechanically compatible

X-Fusion

RC32 29

  • Both use a tapered 1-1/8" to 1.5" steerer
  • Both are built for 700c wheels
Road In-Route Fork 43mmMechanically compatible

ENVE

Road In-Route Fork 43mm

  • Both use a tapered 1-1/8" to 1.5" steerer
  • Both are built for 700c wheels

Frequently Asked Questions

What fits GT Grade Alloy?

On this page we list brake calipers this frame mounts, bottom brackets for this frame shell, seatposts for this seat tube, headsets for this head tube, forks with a matching steerer and wheel size. Each listing was matched on a specification we hold for both parts; anything we could not verify is omitted rather than assumed to fit.