Component | Shimano GRX RX820 1x12-speed Close | Shimano GRX RX820 1x12-speed Wide | Shimano GRX RX820 2x12-speed | Shimano GRX RX825 Di2 1x12-speed Wide Wireless | Shimano GRX Di2 2x11-speed |
Frame | 100% toray T700/T800 UD carbon fibre mix for balanced strength and weight saving using EPS molding process | 100% toray T700/T800 UD carbon fibre mix for balanced strength and weight saving using EPS molding process | 100% toray T700/T800 UD carbon fibre mix for balanced strength and weight saving using EPS molding process | 100% toray T700/T800 UD carbon fibre mix for balanced strength and weight saving using EPS molding process | 100% toray T700/T800 UD carbon fibre mix for balanced strength and weight saving using EPS molding process |
Custom Paint Colour | Yes | Yes | Yes | Yes | Yes |
Custom Graphics Colour | Yes | Yes | Yes | Yes | Yes |
Forks | Carbon with rack mounts | Carbon with rack mounts | Carbon with rack mounts | Carbon with rack mounts | Carbon with rack mounts |
Headset | Ahead 1.5” | Ahead 1.5” | Ahead 1.5” | Ahead 1.5” | Ahead 1.5” |
Headset Spacers | UD Carbon | UD Carbon | UD Carbon | UD Carbon | UD Carbon |
Steerer bung | Compressor | Compressor | Compressor | Compressor | Compressor |
Bottom Bracket | Praxis Works BSA 68 Threaded | Praxis Works BSA 68 Threaded | Praxis Works BSA 68 Threaded | Praxis Works BSA 68 Threaded | Praxis Works BSA 68 Threaded |
Lever & Calliper Assembly Left | ST-RX820/LA GRX | ST-RX820/LA GRX | ST-RX820 GRX 2-speed STI | ST-RX825 GRX | ST-RX825 GRX Di2 2-speed |
Lever & Calliper Assembly Right | ST-RX820 GRX 12-speed STI | ST-RX820 GRX 12-speed STI | ST-RX820 GRX 12-speed STI | ST-RX825 GRX Di2 12-speed STI | ST-RX825 GRX Di2 12-speed STI |
Sprint Shift | NA | NA | NA | NA | NA |
Front Derailleur | NA | NA | FD-RX820 GRX 2-speed | NA | FD-RX825 GRX Di2 2-speed |
Rear Derailleur | RD-RX820 GRX 12-speed | RD-RX822 GRX 12-speed | RD-RX820 GRX 12-speed | RD-RX827 GRX Di2 12-speed | RD-RX825 GRX Di2 12-speed |
Chainset | FC-RX820 GRX | FC-RX820 GRX | FC-RX820 GRX | FC-RX820 GRX | FC-RX820 GRX |
Chainring Options | 40 or 42T | 40 or 42T | 48/31T | 40 or 42T | 48/31T |
Crank Length Options | 170/172.5/175mm | 170/172.5/175mm | 170/172.5/175mm | 170/172.5/175mm | 170/172.5/175mm |
Cassette | CS-R8101 Ultegra 12-speed | CS-M8100 XT 12-speed | CS-R8101 Ultegra 12-speed | CS-M8100 XT 12-speed | CS-R8101 Ultegra 12-speed |
Ratios | 11-34 or 11-36T | 10-45 or 10-51T | 11-34 or 11-36T | 10-45 or 10-51T | 11-34 or 11-36T |
Chain | CN-M8100 XT/Ultegra with quick link, 12-speed | CN-M8100 XT/Ultegra with quick link, 12-speed | CN-M8100 XT/Ultegra with quick link, 12-speed | CN-M8100 XT/Ultegra with quick link, 12-speed | CN-M8100 XT/Ultegra with quick link, 12-speed |
Di2 Battery | NA | NA | NA | BT-DN320 Di2 wireless rear derailleur | BT-DN300 Di2 internal mount |
Cables | Shimano | Shimano | Shimano | Shimano | Shimano |
Brake Callipers | BR-RX820 flat mount | BR-RX820 flat mount | BR-RX820 flat mount | BR-RX820 flat mount | BR-RX820 flat mount |
Rotors | XTR/Dura Ace RT-CL900 | XTR/Dura Ace RT-CL900 | XTR/Dura Ace RT-CL900 | XTR/Dura Ace RT-CL900 | XTR/Dura Ace RT-CL900 |
Rotor Sizes | 160mm | 160mm | 160mm | 160mm | 160mm |
Handlebars | Pro Discover | Pro Discover | Pro Discover | Pro Discover | Pro Discover |
Handlebar Options | 12/20 degree 40/42/44cm | 12/20 degree 40/42/44cm | 12/20 degree 40/42/44cm | 12/20 degree 40/42/44cm | 12/20 degree 40/42/44cm |
Stem | Pro Discover | Pro Discover | Pro Discover | Pro Discover | Pro Discover |
Stem Options | 70/80/90/100/110mm | 70/80/90/100/110mm | 70/80/90/100/110mm | 70/80/90/100/110mm | 70/80/90/100/110mm |
Seatpost | Carbon 180g 27.2mm | Carbon 180g 27.2mm | Carbon 180g 27.2mm | Carbon 180g 27.2mm | Carbon 180g 27.2mm |
Seatpost Options | 0/20mm | 0/20mm | 0/20mm | 0/20mm | 0/20mm |
Saddle | Pro Stealth Performance | Pro Stealth Performance | Pro Stealth Performance | Pro Stealth Performance | Pro Stealth Performance |
Saddle Sizes | 142/152mm | 142/152mm | 142/152mm | 142/152mm | 142/152mm |
Wheels | Hunt 4 Season Gravel Alloy 2025 | Hunt 4 Season Gravel Alloy 2025 | Hunt 4 Season Gravel Alloy 2025 | Hunt 4 Season Gravel Alloy 2025 | Hunt 4 Season Gravel Alloy 2025 |
Wheel Options | Yes | Yes | Yes | Yes | Yes |
Sealant | Orange Seal 100ml x2 | Orange Seal 100ml x2 | Orange Seal 100ml x2 | Orange Seal 100ml x2 | Orange Seal 100ml x2 |
Tyre | Vittoria Terreno T10 - T80 | Vittoria Terreno T10 - T80 | Vittoria Terreno T10 - T80 | Vittoria Terreno T10 - T80 | Vittoria Terreno T10 - T80 |
Tyre Options | Yes, model, colour and size | Yes, model, colour and size | Yes, model, colour and size | Yes, model, colour and size | Yes, model, colour and size |
Axle Front | 12 x 120 x 1.5 | 12 x 120 x 1.5 | 12 x 120 x 1.5 | 12 x 120 x 1.5 | 12 x 120 x 1.5 |
Axle Rear | 12 x 171 x 1.5 | 12 x 171 x 1.5 | 12 x 171 x 1.5 | 12 x 171 x 1.5 | 12 x 171 x 1.5 |
Bartape | BBB BHT-16 - Gravel Ribbon 3.5mm or BBB BHT-14 2.0mm | BBB BHT-16 - Gravel Ribbon 3.5mm or BBB BHT-14 2.0mm | BBB BHT-16 - Gravel Ribbon 3.5mm or BBB BHT-14 2.0mm | BBB BHT-16 - Gravel Ribbon 3.5mm or BBB BHT-14 2.0mm | BBB BHT-16 - Gravel Ribbon 3.5mm or BBB BHT-14 2.0mm |
Hardware | SS Allen Bolts, Washers and Spring Washers | SS Allen Bolts, Washers and Spring Washers | SS Allen Bolts, Washers and Spring Washers | SS Allen Bolts, Washers and Spring Washers | SS Allen Bolts, Washers and Spring Washers |
Anti Rattle | Capgo 1m | Capgo 1m | Capgo 1m | Capgo 1m | Capgo 1m |