Confluence Altus Flat Bar Ebike - Black


SKU: 296455

Confluence Flat Bar Altus opens up more ride opportunities with a MAHLE hub-drive electric assist good for 40Nm of torque.

This gravel ebike features comfortable, confident upright geometry and a flat handlebar for leverage and control. The aluminum frame and carbon fork strike a balance of durability and performance you’ll appreciate, with frame and fork cargo mounts to keep you fueled on those longer rides, or to load up with bikepacking gear. Shimano’s Altus 1x9 drivetrain is a proven workhorse that will get you through any ride without a fuss. Charge Your Adventure with Confluence Flat Bar Altus.


Key Features

On-Bike Storage
Carry more on your bike and less on your body. Our frames and forks feature mounts for extra bottles, camping gear, and ride accessories.

Electric Assist
Salsa ebikes use battery-powered electric assist to help riders ride more in less time or venture onto routes they wouldn’t otherwise.

6061-T6 Aluminum Frame
Confluence’s aluminum alloy tubing is developed specifically for the Confluence frame, and is heat-treated to T6 alloy standards for extra strength and durability.

Carbon Fibre Fork
The Confluence Carbon fork is lightweight, comfortable, cargo-ready, and gives you loads of tire clearance to play with.

MAHLE X35+ Class 1 hub-drive system
This Class 1 rear hub-drive motor delivers electric assist up to 20mph/32kph. It’s one of the lightest ebike systems in-market, and its low-profile appearance mean that Confluence looks like a regular gravel bike.

40Nm max torque
Up to 40Nm of assist that feels natural, not overwhelming. The MAHLE X35+ system offers three assist levels, and sensors detect when you’re pedaling to moderate the level of support generated at the hub.

250Wh internal battery
You can’t see it, but you’ll certainly feel it. MAHLE’s 250Wh battery is nestled inside Confluence’s downtube. This battery size hits the ideal combination of efficiency and weight for what we designed Confluence to do.

Capable of up to 458Wh with MAHLE Range Extender battery (sold separately)
Easily increase your range for bigger adventures with a Range Extender battery available from MAHLE.

iWOC One compact remote top tube controller
Minimal and intuitive controller displays battery status and allows you to cycle through assist modes with one button.

Connected if you want to be
The MAHLE system offers Ant+ connectivity for third party devices, and Bluetooth® for app integration. MAHLE’s MySmartBike app allows for customization, metrics, mapping, and more.

Massive 700c x 50mm tire clearance
Confluence fits up to 700c x 50mm tires, so you can ride those lesser-traveled tracks. 700c x 42mm maximum tire clearance when equipped with fenders.

On-bike cargo features
Attach front and rear racks to your Confluence for serious cargo capacity, or use the sleeker Three-Pack mounts for extra water bottles or our EXP Series Anything Cage HD to pack a cooking kit, extra layers, or whatever else you dream up.


Ebike range depends on many factors, including rider and equipment weight, weather conditions, route choice, assist level and more. The MAHLE X35+ system paired with a 250Wh battery is designed to offer a range of up to 45 miles (72 kilometers) per charge under ideal conditions. MAHLE range-extender batteries (sold separately) greatly increase the ground you can cover with assist.

Build Kit

Frame Confluence
Fork Confluence Carbon
Color Black

Drive Unit MAHLE X35+
Ebike Classification Class 1
Drive Type Hub-Drive
Max Assist Speed 20mph/32kph
Motor Torque 40Nm
Range Estimate 40 miles
Assist Levels 3
Walk Assist No
Throttle No
Battery Capacity Watt Hours 250Wh
Battery Type Li-ion
Removable Battery No
Estimated Charge Time 3 hours
Charger Included Yes
Lights Included No
Front Derailleur N/A
Rear Derailleur Shimano Altus M2000
Cassette Shimano HG200-9, 9-speed, 11–36t
Chain KMC Z9
Crankset FSA Vero Pro, 40t
Shifter Shimano Altus M2010
Brake Levers Tektro RS360A
Brake Caliper Tektro MD-U510/MD-U310
Rotors Tektro TR160-22, 160 mm, 6-bolt
Bottom Bracket RPM Cartridge Bottom Bracket

Headset FSA
Stem Salsa Guide
Handlebar Salsa Salt Flat
Grips/Bar Tape Velo VLG-311D2
Seatpost Promax SP-2016
Saddle WTB Volt

Front Hub WTB Serra
Rear Hub MAHLE X35+
Spoke Straight gauge, black
Rim WTB ST i23, 32h
Front Tire Teravail Washburn 700c x 42mm, Durable casing, wire bead
Rear Tire Teravail Washburn 700c x 42mm, Durable casing, wire bead

Complete Bike Weight 32.5 lb (Large frame)

*Specification and pricing subject to change without notice.

Frame Specs

Frame Construction Aluminum
Fork Construction Carbon
Rear Dropout Configuration / Rear Derailleur Hanger 10x1mm threaded 136mm proprietary spacing/with proprietary derailleur hanger
Rear Hub Spacing 136mm
Rear Axle Dimensions 10x1mm
Rear Brake Flat-mount
Front Brake Flat-mount
Head Tube IS
Steerer Tube 350mm
Crown Race Integrated
Stock Headset Upper (S.H.I.S.) IS41
Stock Headset Lower (S.H.I.S.) IS52
Seat Collar 32.0mm
Seatpost 27.2mm
Dropper Compatible (Routing) Yes (internal)
Front Derailleur (Clamp) 31.8mm
Front Derailleur Type Down swing, down pull
Max Chainring 1x: 42t max (47mm chainline); 2x: 48/33t max (47mm chainline)
Bottom Bracket 68mm BSA threaded
Tire Clearance Frame 700 x 50mm
Tire Clearance Fork 700 x 50mm
Fork Offset 50mm
Front Hub Spacing 12x100mm
Front Axle Dimensions M12xTP1.5x120mm
Front Brake (Rotor) 160mm
Bottle Mounts Frame 2
Bottle Mounts Fork Three-Pack mounts (two sets)
Downtube Accessory Mounts No
Rack Mounts Frame Yes
Rack Mounts Fork Yes
Fender Mounts Frame Yes
Fender Mounts Fork Yes


Confluence Flat Bar Altus frame

Size X-Small Small Medium Large X-Large
A. Effective Top Tube 550 570 600 625 650
B. Stand Over 622 659 721 761 800
C. Reach 394 406 424 438 451
Crank Arm Length 165 170 172.5 172.5 175
D. Stack 510 538 575 613 650
E. Total Seat Tube Length 340 380 450 490 530
F. Headtube Length 90 120 160 200 240
G. Headtube Angle 68.5 68.5 68.5 68.5 68.5
H. Seat Tube Angle 73 73 73 73 73
Handlebar Width 700 700 700 700 700
I. BB Drop 70 70 70 70 70
J. BB Height 285 285 285 285 285
K. Chainstay Length 440 440 440 440 440
L. Fork Length Axle to Crown 402 402 402 402 402
M. Fork Offset 50 50 50 50 50
N. Wheelbase 1056 1078 1111 1140 1168
Recommended Rider Height 142cm–150cm 152cm–163cm 163cm–173cm 173cm–183cm 183cm–193cm
Stem Length 60 70 70 80 90

Measurements based on:

  • An unsprung bike (no sag)
  • A 700c x 42 mm tire measuring 710 mm in diameter
  • Standover (B) for all sizes is measured vertically to top of toptube from a position 50 mm forward of BB center




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