SRAM Red + XX1 AXS Mullet Upgrade Kit
2 052,60
SRAM Red + XX1 AXS Mullet Upgrade Kit
Shimano GRX RX825 Di2 12 Speed
1 347,31
Shimano GRX RX825 Di2 12 Speed
SRAM Apex XPLR AXS 1x12
932,43
SRAM Apex XPLR AXS 1x12

SRAM Red + XX1 AXS Mullet Upgrade Kit vs. Shimano GRX RX825 Di2 12 Speed vs. SRAM Apex XPLR AXS 1x12

SRAM Red + XX1 AXS Mullet Upgrade Kit
Shimano GRX RX825 Di2 12 Speed
SRAM Apex XPLR AXS 1x12
SRAM Red + XX1 AXS Mullet Upgrade Kit

2 052,60

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Shimano GRX RX825 Di2 12 Speed

1 347,31

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SRAM Apex XPLR AXS 1x12

932,43

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This is what our customers think

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Pros
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Cons
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According to the product specialist

Pros
With this SRAM Red + XX1 AXS Mullet Upgrade kit, you can upgrade your gravel bike to a wider gear range.
The SRAM XX1 Eagle AXS rear derailleur also works with X01 and GX Eagle AXS groupsets.
Fully wireless shifting and therefore easy to mount on the bike.
The SRAM XX1 Eagle XG-1299 mtb cassettes are very light and strong because it is mostly cut from one piece of steel.
The Shimano GRX RX8255 Di2 12 speed groupset is a complete, high-end electronic groupset for gravel bikes.
This groupset's shifters feature a third Di2 button to operate your bike lights, computer or other devices.
The ergonomic design of the GRX RX825 shifters fits handlebars with a flare design and reduces hand strain, increasing your control on uneven terrain.
The rear derailleur is outfitted with the Shadow RD+ system for quiet and precise shifting, which also allows you to easily remove your rear wheel.
The hydraulic disc brakes are specifically tailored for gravel and off-road use, so you can count on precise and efficient brake performance no matter the circumstances.
The gravel-oriented Sram Apex XPLR 1x12 shifts wirelessly, quickly and smoothly.
SRAM Apex AXS disc brakes give you smooth, powerful hydraulic braking.
A single front chainring, 12 speeds and a wide range of gears are an unbeatable combination on any terrain.
The crankset has X-SYNC direct-mount chainrings for good chain guidance.
The rear derailleur keeps the chain under tension and prevents it from chattering.
Cons
A 10/50 or 10/52 cassette jumps with larger steps when shifting, but on the other hand has a much larger gear range.
The new Shimano GRX RX825 is only available as 2X version.
Apex is heavier than the more expensive Force or Red XPLR.

Specifications

Brake Type
Disc Flat Mount
Disc Flat Mount
Disc Flat Mount
Bike Type
Mountain bike
Road bike
Gravel bike
Gravel bike
Number of gears
12 speed
12 speed
12 speed
Shifting Type
Electronic
Electronic
Electronic
Crankset (Axle) Type
Hollowtech II
Suitable for
SRAM eTap AXS
SRAM Etap
SRAM XPLR
Drivetrain Type
1 x 12
Type
Single
Cassette Ratio
10 / 50
10 / 52
11 / 34
11 / 36
11 / 44
Ratio
40
Crankset axle fit
SRAM DUB (29mm)
Crank Ratio
48 / 31
40
Crank length
170 mm
172.5 mm
170 mm
172.5 mm
175 mm
Bottom Bracket
No, not included
Cables
Hydraulic brake lines
Electronic derailleur cables
Hydraulic brake lines
Quality
Best
Good
Colour
Black
Black
Black
Type
1x12
2x12
1x12
Diameter Disc Brake Rotor
160 mm front / 160 mm rear
Brake Mount
Flat Mount
Crankset Type
Double
Single
Packaging
Factory Packaging
OEM
Factory Packaging
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