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Motobecane
Motobecane MuleKick RX400 Carbon Gravel Bike

Motobecane MuleKick RX400 Carbon Gravel Bike

Last price we saw

$1,499.00at Bikesdirect.com, last seen Oct 31

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Deal: 57% off at Bikesdirect.com →

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Our take on the Motobecane MuleKick RX400 Carbon Gravel Bike

The Motobecane MuleKick RX400 is a full-carbon gravel bike sold direct by Bikesdirect.com, built around a Shimano GRX 20-speed drivetrain and hydraulic disc brakes. It stands out for a carbon frame and fork, tubeless-ready WTB wheels and clearance for 700x50c tires at a price well below most carbon gravel bikes. Its price has held at $1,499 since October 30, 2026, so there is no cheaper day in its recent history to wait for.

Best forGravel riders who want a carbon frame on a tight budgetBuyers comfortable assembling and adjusting a direct-to-consumer bikeRiders who want wide 700x50c tire clearanceShimano GRX fans wanting 2x gearing and hydraulic brakes
Pros
  • Full carbon frame and bladed carbon fork at a low price
  • Shimano GRX 20-speed drivetrain with integrated hydraulic braking
  • 160mm rotors front and rear for confident stopping
  • Tubeless-compatible WTB ST i19 TCS 2.0 wheelset
  • Clearance for tires up to 700x50c
  • Ships mostly assembled with pedals included
Cons
  • Maxxis Overdrive 38c tires are a basic all-round choice, not a gravel-specific tread
  • No thru-axle or geometry details published to compare fit
  • Direct-to-consumer purchase means no shop fitting or local warranty support
  • 2x GRX gearing adds weight and complexity versus a 1x setup

Motobecane MuleKick RX400 Carbon Gravel Bike prices at every store

  • Bikesdirect.comCheck price at Bikesdirect.com

Motobecane MuleKick RX400 Carbon Gravel Bike price history

$1,499.00$1,499.00
Oct 30Oct 31

Lowest price we've seen: $1,499.00 on Oct 30 at Bikesdirect.com. Tracked across 1 store since Oct 30.

What reviewers say

Motobecane has a long reputation for light, well-equipped bikes at low prices, and owners of its carbon models generally report strong value. Specific rider feedback on the MuleKick RX400 is limited, so treat claims about its ride as general to the brand.

Pros
  • A lot of bike for the money
  • Light frames with good components at reasonable prices
  • Racing heritage and performance value
Cons
  • Limited independent reviews of this exact model
  • Direct-order bikes may need shop adjustment out of the box

From Bikesdirect.com

  • Full carbon frame with DynamicAngle Chainstay for precise handling and reduced chain strikes
  • Shimano GRX 20-speed gravel-specific drivetrain with integrated braking and shifting
  • Shimano hydraulic disc brakes with 160mm rotors for controlled braking in all weather
  • Bladed carbon fork with flat disc mount and internal cable routing
  • WTB ST i19 TCS 2.0 tubeless-compatible wheelset
  • Clearance for tires up to 700x50c; comes with Maxxis Overdrive 700x38c tires
Sizes
46cm, 49cm, 52cm, 55cm
Materials
UD weave carbon frame and carbon fork blades; alloy steerer; Ritchey alloy handlebar and stem; WTB cromoly saddle
Fit
Endurance design with higher headtube for a more upright, comfortable riding position
Sizing
46cm fits 5'4" to 5'7"; 49cm 5'8" to 5'11"; 52cm 5'11" to 6'2"; 55cm 6'2" to 6'5". Between sizes, size down for more crotch clearance. Approximate sizing; final
Care
Maintain seatpost clamp collar tightness; insert seatpost at least 2 inches below the lowest top tube weld
Guarantee
30 Day Money-Back Guarantee; covered by factory warranties as an authorized dealer
Returns
30 Day Money-Back Guarantee
Shipping
Fast FREE Delivery in 48 USA, signature required; AK/PR/HI additional cost; contact for PO Box/APO/FPO options; electric bikes can't ship to AK/PR/HI/APO
In the box
Bike (most are up to 90% assembled), XTL brake levers, FREE Wellgo alloy road pedals with 9/16" CNC cromoly axle
Size chart
SizeHead Tube AngleHead Tube Length (mm)Effective Top Tube (mm)Chainstay (mm)Standover (inch)
4669.510152942529.4
4971.112555042530
5215057142532.1
5518059342532.7

What buyers say

Buyers like
  • Known for delivering a lot of bike for the money
  • Exceptionally light production bikes with great components at reasonable prices
  • Great performance value upholding racing heritage
  • Astonishing value and performance
  • Absolute feather weight

Specifications

Rear Shock
n/a (does not apply)
Motor / Battery / Controller
n/a (does not apply)

Questions and answers

Is the MuleKick RX400 worth it?
At $1,499 at Bikesdirect.com as of October 30, 2026, a carbon frame, carbon fork, GRX 20-speed drivetrain and hydraulic discs is a low price for that spec. It suits riders who can handle minor assembly and setup themselves.
What is the difference from the RX300 or other MuleKick models?
The RX400 uses a full carbon frame and fork with Shimano GRX 20-speed gearing. Lower-numbered MuleKick builds typically use alloy frames or simpler drivetrains, so the RX400 is the lighter, higher-spec option.
What tires fit and what comes on it?
It ships with Maxxis Overdrive 700x38c tires and clears up to 700x50c. That leaves room for wider gravel tires, and the WTB rims are tubeless-compatible.
What is in the box?
The bike, which arrives up to 90% assembled, plus Wellgo alloy road pedals with 9/16-inch cromoly axles. You supply your own saddle position setup and any tubeless conversion kit.
Does it have hydraulic brakes?
Yes. Shimano hydraulic disc brakes with 160mm rotors front and rear, paired with the GRX shift levers.
When is it cheapest?
Its lowest recorded price is $1,499 at Bikesdirect.com as of October 30, 2026, the same as its highest, so it has not gone on sale in that window. Watch for seasonal direct-seller discounts rather than expecting a lower everyday price.
What do buyers say about the Motobecane MuleKick RX400 Carbon Gravel Bike?
Buyers like: Known for delivering a lot of bike for the money; Exceptionally light production bikes with great components at reasonable prices; Great performance value upholding racing heritage.