SRAM PREFERRED SOLUTIONS
Mullet 1x (electronic): Eagle cassette (10-52) and derailleur + Road crank (40t) and eTap AXS shifters (electronic): 40 x 10-52 = 20.4-106 gear inches
2x (electronic): Force XPLR eTap AXS 2x: 43/30 X 10-36 = 22-114 gear inches
Apex eagle mechanical (40 or 42T): Gear inches (650B X 50mm): 40 X 10-52 = 21 to 108 gear inches; Gear inches (650B X 50mm): 42 X 10-52 = 21 to 113 gear inches
https://www.sram.com/en/life/stories/gravel-gearing-horses-for-courses
https://www.sram.com/en/life/stories/the-right-rival-gearing-for-you
I want EXTREME gravel. – Get as rowdy as you’d like by pairing Rival controls with a wide range 10-50 or 10-52T Eagle cassette, Eagle chain, and GX Eagle AXS rear derailleur. Tackle the singletrack you would normally reserve for your mountain bike with a Rival 1 Wide crankset with a 38T. MTB gearing on a drop bar bike? Party on…on any surface.
I want to race gravel. – You’re flying with the fastest group gravel events, where a 10-36 will pair perfectly with your choice of single chainring in the 38-42T range. You can run up to a 46T on the Rival 1 Wide Crankset if you have the cannon legs for it or tend to stick to flat courses.
I want to adventure on gravel. – Go 2x to give yourself even more versatility with a 46/33 or 43/30 chainring combo. Your body will thank you when your bike is weighted down for a weekend of camping or a monthlong tour. The 43/30 Wide crankset and accompanying wide front derailleur even allow you to run bigger tires with the wider stance of the crank arms.
Apex eagle mechanical
https://www.sram.com/en/life/stories/apex-gearing
https://www.sram.com/en/sram/models/fc-apx-1w-d1
40 or 42T
10-52
Gear inches (650B X 50mm): 40 X 10-52 = 21 to 108 gear inches
Gear inches (650B X 50mm): 42 X 10-52 = 21 to 113 gear inches
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https://www.bikeradar.com/reviews/components/groupsets/gravel-groupset/sram-apex-eagle-review/
Apex Eagle mechanical
Our 12-speed technology also comes in mechanical form for those seeking a cable-actuated adventure. The Apex Eagle rear derailleur works with 12-speed mechanical Apex shifters. Just add an Eagle cassette and chain to party on without plugging in.
Compatible cassettes: 11-50T for splined driver body, and 10-50T or 10-52T for XD driver body
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https://www.cyclingnews.com/features/sram-road-groupsets/
SRAM divides its road bike groupsets into four ranges. At the top is RED which is its premium groupset used by its sponsored pro teams. Next down is Force, then Rival, and finally Apex. The same hierarchy is applied to its 12-speed AXS electronic groupsets and its older 11-speed and 10-speed groupsets.
AXS is SRAM's name for its 12-speed wireless electronic groupset tech, and its accompanying configuration app. The 11-speed SRAM RED electronic groupset was labelled eTap and SRAM ported this label to its 12-speed eTap AXS groupsets too, but it's now dropping the eTap from the nomenclature, just calling them Force AXS, etc.
Within each groupset tier, there are double chainring 2x and single chainring 1x (aka one-by) options. AXS groupsets also add wider range XPLR cassettes and derailleurs, aimed at gravel riders.
XPLR: https://www.sram.com/en/sram/road/collections/xplr
1x; 12 speed; mechanical and wireless (AXS)
Mechanical at the Apex level
AXS available in RED, Force, Rival, and Apex
Cassette: 11-44T or 10-44T
Chainrings (1x) in sizes from 38-46T
Gear inches (650b X 50mm) using 38 X 10-44 = 23 to 102 gear inches
Four technologies:
1x: Single front chainring road groupsets
Gear range (10 and 11 speed): 40T x 11-42 = 25.6 to 98 GI
22: SRAM's 2 x 11-speed mechanical groupset
eTap: wireless road groupset.
43/30 by 10-36 (650b X 45mm): 22-114
eTap AXS: 12-speed and wireless technologies, and is cross-compatible with Eagle AXS components from the brand's mountain bike groupsets range.
SRAM road groupsets (in rank order)
Apex (mechanical)
Apex: 10-speed [Derailleur (10 speed) Max 32T; Crank (10 speed): 50/34]
Apex 1: 11-speed [Derailleur (10 speed) Max 42T; Crank (10 speed): 40T, 42T, 44T]
Rival (mechanical)
Rival: 11-speed [Rival (2x): Derailleur 22 (11 speed) Max 32T; Crank (11 speed): 46/34T, 50/34T; 46/36T, 50/34T, 52/36T]
Rival (1x): Derailleur (11 speed) Max 42T; Crank (11 speed): 40T, 42T, 44T, 50T]
Rival (electronic)
Rival eTap AXS: 12-speed wireless electronic
1x
2x: [46/33 X 10-36]
Force (mechanical)
Force (2x): 11-speed [Force (2x): Derailleur 22 (11 speed) Max 32T; Crank (11 speed): 46/36T, 50/34T, 53/39T ]
Force (1x): Derailleur (11 speed) Max 42T; Crank (11 speed): 40T, 42T, 50T, 52T ]
Force (electronic)
Force eTap AXS: 12-speed wireless electronic (1x and 2x)
1x: Compatible with: 10-44T XPLR and 10-36T cassettes and Flattop chains. Not compatible with Eagle cassettes and chains. Direct mount chainrings in 38t through 46t. GEAR INCHES (650b X 45mm) (38 x 10-44) = 23-101 gear inches
2x: SRAM Force 43/30t wide crankset; cassette 10-36; GEAR INCHES (650b X 45mm): 22-114
Red (mechanical)
Red: 11-speed
Red eTap: 11-speed
Red (electronic)
Red eTap AXS: 12-speed wireless electronic
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SRAM XPLR gravel groupset ranking
Rival eTap AXS XPLR: 12-speed wireless electronic
Force eTap AXS XPLR: 12-speed wireless electronic
Red eTap AXS XPLR: 12-speed wireless electronic
https://www.sram.com/en/sram/road/series/sram-force-etap-axs
https://www.sram.com/en/sram/road/collections/wider-gearing-for-force-etap-axs
46/33: https://www.sram.com/en/sram/models/fc-frc-d1
43/30: https://www.sram.com/en/sram/models/fc-frc-w-d1
https://www.sram.com/en/life/stories/gravel-gearing-horses-for-courses
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43/30 by 10-36
GEAR INCHES (650b X 45mm): 22-114
GEAR INCHES (700c X 45mm): =
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46/33 by 10-36
GEAR INCHES (650b X 45mm):
GEAR INCHES (700c X 45mm): =
X-Range gearing. (12 speed)
https://www.sram.com/en/life/stories/x-range-gearing
SRAM has developed X-Range gearing: four 2x chainring sets and five cassettes; X-Range achieves wider range and tighter jumps by going to a 12-speed cassette, but also by moving some of the gear range from the front of the drivetrain to the back. We’ve employed smaller chainrings with a consistent 13T difference, while giving the cassettes a 10T-start for wider range (up to 10-36, or 360%!). That means you can stay on the same ring longer, requiring fewer front shifts, which are inherently less efficient than rear shifts. And when a front shift is executed, the smaller jump is smoother and allows you to get to the right cadence with fewer compensation shifts in the rear. Fewer, faster front shifts make it easier for you to find the right gear, and that’s a distinct performance advantage relative to traditional drivetrains.
https://www.sram.com/en/sram/models/gs-frc-e-a1
https://www.sram.com/en/sram/models/fc-frc-w-d1
Force 22
https://www.sram.com/en/sram/models/cs-xg-1270-d1
https://bikepacking.com/gear/sram-force-axs-wide/
Possible drivetrain combinations
X-Range
43/30 X 10-36 22-114 gi
46/33 X 10-36
Traditional
48/31 X 11-34
46/30 X 11-34 23-110 gi
XPLR
https://www.sram.com/en/sram/road/collections/xplr
1x-specific XPLR AXS wireless drivetrains target a gearing sweet spot. With a 10-44T cassette and matching derailleur. Available in RED, Force, and Rival. We originated the 1x drivetrain, and the SRAM RED and Force 1 cranksets evolve the innovation. Lightweight and stiff direct mount 1x chainrings in sizes from 38-46T mate with durable carbon arms
38 X 10-44 = 23-101 gear inches
SRAM AXS system (full review here), which allows the AXS Force wireless shifters to communicate with the AXS Eagle rear derailleur—“business” (Force 1 road shifters) in the front, and “party” (MTB Eagle derailleur and cassette) in the back. It works extraordinarily well, but it’s also quite expensive—
Mullet: Eagle + Road crank and shifters (electronic)
https://www.sram.com/en/life/stories/gravel-gearing-horses-for-courses
ADVENTURE 1X EAGLE
mullet build. An Eagle AXS rear derailleur paired to road eTap AXS shift/brake levers allows the use of an Eagle drivetrain with a 10-50 or 10-52 cassette. Pair with a road chainring in the 38-42T range for your biggest adventures.
38 x 10-52 = 19.4-101 gear inches
40 x 10-52 = 20.4-106 gear inches
42 X 10-52 = 21.5-111.5 gear inches
SRAM NX Eagle
https://www.sram.com/en/sram/mountain/series/nx-eagle?filters=&sort=Relevancy&page=1
DUB crankset: Chainring sizes: 30, 32, 34
Cassette: 11-50t:11,13,15,17,19,22,25,28,32,36,42,50
12 speed, 11-50t
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DOUBLE CRANKSET
GX 2x10 and 2x11
GX 2x11: When paired with our wide range 10-42t cassette and GX 2x rear derailleur, GX 2x11 provides the widest range of gears ever offered on a 2x drivetrain. Chainring: 36/24
GX 2x10: Crankset: 34/22, 36/22, 38/24
SRAM X5 crankset (2x10): 10s: 36/22, 10s: 38/24, 10s: 39/26, 10s: 42/28, 10s: 44/33/22, 10s: 48/32, 34/22, 36/22, 38/24, 39/26, 42/28, 44/32/22, 44/33/22, 48/32, 9s: 44/32/22
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GX Cassettes:
11 Speed: 10-42t:10,12,14,16,18,21,24,28,32,36,42
10 Speed: 11-36t