The all new Ultegra R8100 series is highest performing and most elegant version of the group to date. Ultegra R8100 is only available as a Di2 option which mates perfectly with the ECHO. Shimano greatly simplified their Di2 transmission by going wireless from the shifters and then keeping a wired transmission from the battery to the front derailleur and rear derailleur. This eliminates one of our biggest pain points with the previous Di2 which is routing e-wires through handlebars and fitment of clunky junction boxes into the frame. Our standard configuration comes paired with Industry Nine’s very lightweight UL250 CX wheels and the all-new WTB Vulpine ultra-fast rolling tubeless gravel tire in 700x40, but you can select the exact wheel and tire combo to build your beast as you please.
At the heart of the ECHO’s genetic code is pure unadulterated speed - the ability to transform from a road race thoroughbred to a versatile, agile gravel bike with a simple switch of flip chips at the front and rear dropouts. These eccentric chips and corresponding dropout design allow the rider to easily change the bike geometry, effectively changing the chainstay length and fork length by 1 cm. The difference transforms the bike from a road machine with 415mm chainstay length, 368mm fork length, 73-degree headtube angle, and tire clearance for up to 30mm, to a gravel bike with 425mm chainstay length, 378mm fork length, 72.5mm headtube angle, and 40mm tire clearance - all within a 10-minute switch of dropout chips. Pure road performance one day, gravel race-ready the next. One bike. No compromise.
The ECHO Stem is a fully integrated system designed in tandem with the fork. It conceals the cables while using a standard headset allowing the rider to easily swap stem lengths, and it works with a growing list of handlebars designed with integrated cables in mind. The ECHO stem system is the simplest and most user-friendly on the market today. The cables run through a channel on the top of the stem and are concealed by a faceplate, top cap, and the steerer tube. Headset adjustment is moved from the traditional position at the top of the stem to a threaded portion on the bottom of the stem, effectively increasing the steerer clamp length to provide headset preload, much like a threaded headset. The Echo stem is available in 6 sizes at 10mm increments (80-130mm) and is a -6 degree drop. Like all things designed by Allied, the ECHO stem is made in our Bentonville factory.
*Due to the wire routing on the Shimano front derailleur, Shimano Echo builds have a 38mm rear tire clearance.
Key Features
- GEOMETRY
- Flip Chips change geometry between road and gravel.
- INTEGRATION
- ECHO Stem hides the brake cables, provides incredible stiffness and is painted to match.
- COMPATIBILITY
- The ECHO is compatible with all current electric road and gravel 1x and 2x drivetrain options from Shimano and SRAM.
- BOTTLE MOUNTS
- 2x downtube, and 1x seat tube
- TIRE CLEARANCE
- 700x30mm in road mode, and 700x40mm, or 650x50mm in gravel mode.
Build Kit
- BOTTOM BRACKET
- Shimano Ultegra SM-BBR60
- BRAKES
- Shimano Ultegra BR-R9170
- CASSETTE
- Shimano Ultegra CS-R8100 11-34
- CHAIN
- Shimano XT CN-M8100
- CRANKSET
- Shimano Ultegra FC-R8100 50/34
- FRONT DERAILLEUR
- Shimano Ultegra FD-R8150 Di2
- HANDLEBAR
- FSA Energy Compact
- HANDLEBAR TAPE
- Arundel Gecko
- REAR DERAILLEUR
- Shimano Ultegra RD-R8150 Di2
- SADDLE
- Selle Italia Model X Superflow
- SEATPOST
- FSA SL-K Carbon Seatpost
- SHIFT LEVERS
- Shimano Ultegra ST-R8170 Di2
- STEM
- ALLIED ECHO
- TIRES
- Vittoria Corsa N.EXT TLR 700x28
- WHEELSET
- Zipp 303 S Tubeless Disc-Brake
Sizing Guide
XXS | XS | S | M | L | XL | |
Crankset | 170mm | 170mm | 172.5mm | 172.5mm | 175mm | 175mm |
Handlebar | 40cm | 40cm | 40cm | 42cm | 42cm | 44cm |
Stem | 90mm | 90mm | 100mm | 110mm | 110mm | 120mm |
Seatpost | 0mm | 0mm | 0mm | 25mm | 25mm | 25mm |
Frame Geometry

XXS | XS | S | M | L | XL | |
---|---|---|---|---|---|---|
G. Stack | 515 | 530 | 550 | 570 | 595 | 620 |
H. Reach | 372 | 381 | 387 | 394 | 402 | 409 |
E. ST Length | 460 | 510 | 530 | 550 | 570 | 600 |
A. HT Angle | 72 | 72 | 73 | 73 | 73 | 73 |
B. ST Angle | 74.5 | 74.5 | 73.5 | 73.5 | 73.5 | 73.5 |
I. BB Drop | 77.5 | 77.5 | 77.5 | 77.5 | 77.5 | 77.5 |
F. CS Length | 415 | 415 | 415 | 415 | 415 | 415 |
Fork Length | 368 | 368 | 368 | 368 | 368 | 368 |
D. Effective Top Tube | 515 | 528 | 550 | 564 | 579 | 594 |
C. HT Length | 107 | 123 | 140 | 161 | 188 | 214 |
J. Wheelbase | 971 | 985 | 988 | 1001 | 1017 | 1032 |
K. Standover | 722 | 736 | 769 | 804 | 825 | 846 |
L. Fork Rake | 47 | 47 | 47 | 47 | 47 | 47 |
Front Center | 562 | 576 | 580 | 593 | 609 | 624 |
XXS | XS | S | M | L | XL | |
---|---|---|---|---|---|---|
G. Stack | 520 | 535 | 555 | 575 | 600 | 625 |
H. Reach | 367 | 376 | 382 | 389 | 397 | 404 |
E. ST Length | 460 | 510 | 530 | 550 | 570 | 600 |
A. HT Angle | 71.5 | 71.5 | 72.5 | 72.5 | 72.5 | 72.5 |
B. ST Angle | 74 | 74 | 73 | 73 | 73 | 73 |
I. BB Drop | 75 | 75 | 75 | 75 | 75 | 75 |
F. CS Length | 425 | 425 | 425 | 425 | 425 | 425 |
Fork Length | 378 | 378 | 378 | 378 | 378 | 378 |
D. Effective Top Tube | 515 | 528 | 550 | 563 | 579 | 593 |
C. HT Length | 107 | 123 | 140 | 161 | 188 | 214 |
J. Wheelbase | 985 | 999 | 1002 | 1015 | 1031 | 1046 |
K. Standover | 722 | 736 | 769 | 804 | 825 | 846 |
L. Fork Rake | 48 | 48 | 48 | 48 | 48 | 48 |
Front Center | 566 | 580 | 584 | 597 | 613 | 628 |