Crankset weight looks straightforward until you start comparing road, gravel and MTB builds side by side. The number on the page only makes sense when you know whether it covers the complete crankset, a power meter, a specific arm length, or a wider spindle standard. This guide breaks down SRAM crankset weights into the figures that matter, the differences that change the number, and the models I would actually compare in 2026.
What matters most when comparing SRAM crankset weights
- The published weight is usually tied to one exact build, not every crank length or chainring option.
- The lightest verified current MTB benchmark is the XX SL Eagle at 475 g.
- The lightest verified current road benchmark I could confirm is the RED Crankset at 545 g.
- Power meters add real mass, but the penalty is often smaller than riders expect.
- Road Wide, standard road, gravel and MTB cranks are not interchangeable comparisons.
- For most riders, fit and drivetrain compatibility matter more than chasing the last 20 g.
How SRAM’s weight numbers should be read
I never treat a crankset weight as a universal constant. SRAM usually publishes one configuration, which means the figure can reflect a specific arm length, one chainring size, a particular spindle standard, and sometimes the presence of a power meter battery or protective boots on MTB cranks.
That is why a 172.5 mm road crank and a 170 mm trail crank are not directly interchangeable on the scale, even if the model family looks similar. A DUB crank uses SRAM’s spindle and bottom-bracket system, and that matters because the same arm can sit on different frame standards and still land on different real-world weights once the full build is counted.
- Arm length changes the amount of material, so 160 mm and 175 mm versions are never a perfect apples-to-apples comparison.
- Chainring size matters because larger rings bring more material and sometimes different spiders or mounts.
- Power meter hardware adds mass, whether the sensor sits in the spider or the spindle.
- Wide versus standard spindle changes chainline, Q-factor and the overall package.
- Included hardware such as bolts, batteries or MTB boots can shift the quoted figure by a few grams.
Once you read the number this way, the next question is simple: which models actually sit at the light end of the range?
The lightest verified SRAM cranksets right now
On SRAM’s current service pages, the cleanest verified numbers are the ones below. I am keeping the table strict so the comparisons stay honest, which is especially useful if you are shopping from the UK and want to avoid retailer listings that mix crank-only and complete-build weights.
| Model | Category | Published weight | Weight basis | What I take from it |
|---|---|---|---|---|
| XX SL Eagle | XC MTB 1x | 475 g | 175 mm / 34T / DUB wide / Boots | The current lightweight benchmark for race-focused MTB. |
| XX SL Eagle AXS Transmission Power Meter | XC MTB 1x PM | 535 g | 170 mm / 32T / DUB wide | Power costs weight, but not as much as many riders expect. |
| XX Eagle | XC or trail MTB 1x | 560 g | 170 mm / 32T / DUB wide / Boots | A sensible step up when minimum mass is not the only goal. |
| X0 Eagle | Trail MTB 1x | 685 g | 170 mm / 32T / DUB wide | Heavier, but built for a different durability target. |
| GX Eagle DUB | Value MTB 1x | 621 g | DUB 175 mm Boost / 32T | One of the strongest value points if you want a tough all-rounder. |
| NX Eagle DUB | Entry MTB 1x | 638 g | DUB 175 mm Boost / 32T | A little heavier than GX, so I would only choose it when price or build spec makes sense. |
| RED Crankset | Road 2x | 545 g | 172.5 mm / 48-35 | The cleanest road benchmark I could verify. |
| RED AXS Power Meter | Road 2x PM | 580 g | 172.5 mm / 48-35 / coin cell battery | A realistic example of the power-meter penalty. |
| Force 1 Crankset | Older road 1x reference | 542 g | 42T / 172.5 mm / BB30 | Still useful as a carbon 1x reference, but not a direct current E1 comparison. |
For the newer road and gravel E1 families, SRAM leans more on relative claims than a universal gram number in the static text snapshot I could verify. Force E1 is positioned as lighter and stiffer, while Rival E1 is described as more than 50 g lighter than the previous generation. That still tells you something useful: the design direction is clear even when the public page is not giving you one clean number.
The table above gives you the anchor points. The next step is understanding why road, gravel and MTB numbers are not directly comparable, even when they look close.
Why road, gravel and MTB numbers are not directly comparable
SRAM’s DUB Road Wide guide makes the geometry trade-off explicit: standard road uses a 45 mm chainline and a 145 mm Q-factor, while Road Wide moves to 47.5 mm and 150 mm. That wider layout creates tyre and frame clearance, but it is not the same thing as a lighter or faster crank.
| Setup | Chainline | Q-factor | Best fit for |
|---|---|---|---|
| Standard road DUB | 45 mm | 145 mm | Road race and frames built around a narrower spindle |
| Road Wide DUB | 47.5 mm | 150 mm | Gravel, wider tyres and frames that ask for the wider setup |
That geometry difference is why a gravel crank can weigh a little more and still be the smarter choice. I would also be cautious about assuming any Wide system is an easy swap to standard road parts, because SRAM treats those setups as distinct rather than interchangeable. If the frame wants Wide, the fit matters more than the scale.
That leads into the part many riders care about most: what actually adds grams once you move from a bare crank to a complete build?
What actually adds grams to a crankset
If I am trying to explain a weight difference quickly, I start with the obvious hardware first. In practice, the grams usually come from a handful of places, and the order matters more than people think.
- Carbon versus aluminium arms is the biggest headline difference in SRAM’s range.
- Power meter hardware adds measurable weight, especially on spider-based systems.
- Chainrings and spiders are not just functional parts; they are part of the mass total.
- Wide spindles and extra clearance hardware can add a little weight in exchange for fit.
- Protective boots and small fitting parts can be included in some MTB quoted weights.
The clearest real-world example is the current RED road line. The non-power RED crankset is 545 g, while the RED AXS Power Meter is 580 g, so the meter adds 35 g on that platform. On the MTB side, the XX SL Eagle Transmission power-meter crankset is 535 g versus 475 g for the non-PM XX SL Eagle, which is a 60 g jump in the published figures. That spread is normal, and it is exactly why I compare like with like instead of assuming all power meters carry the same penalty.
Once you understand where the weight comes from, the right choice becomes less about the lightest number on paper and more about the level of compromise you are willing to accept.
Which weight range makes sense for your build
My rule is simple: if the bike is a race machine, I start with the lightest verified option that still matches the frame standard. If it is a do-everything bike, I usually accept a small gram penalty in exchange for better tyre clearance, easier service and a part I will not second-guess on rough days.
- XC race - XX SL is the obvious benchmark when every gram matters and the frame is built for it.
- Harder trail riding - XX or X0 make more sense when durability and stiffness start to matter more than the absolute minimum weight.
- Budget-conscious MTB builds - GX and NX are heavier, but the price-to-usefulness ratio is often better for real riders than a race-only crank.
- Road performance - RED is the premium weight target, while Force is the more realistic sweet spot for many riders.
- Gravel and mixed-terrain riding - XPLR or Wide often beats a lighter standard road crank because fit and tyre clearance are the real constraints.
I would rather save 200 g at the wheel than chase 20 g at the crank if the latter forces a bad chainline or the wrong front-end fit. That is especially true on gravel bikes, where the drivetrain has to leave room for mud, tyre volume and rough ground instead of just looking good on a spec sheet.
Before you order, there are a few checks that matter more than the headline figure.
The checks I would make before ordering in the UK
UK listings often compress too many details into one line, so I slow down and verify the exact spec before I click buy. I have seen too many listings mix arm-only parts, complete cranksets and power-meter upgrades as if they were the same product.
- Match the model code - FC-RED-E1, FC-FRC-E1, FC-RIV-E1, FC-XX-SL-D1 and similar codes tell you far more than the marketing name.
- Match the crank length - 160 mm, 165 mm, 170 mm, 172.5 mm and 175 mm do not all weigh the same.
- Match the chainring combo - 46/33, 48/35 and 50/37 road builds are not the same item.
- Confirm power meter or non-power - the weight gap is real, and the fit can change too.
- Check the frame standard - standard road, Road Wide, MTB or MTB Wide must line up with the frame and BB shell.
- Check what the seller means by weight - some listings include only the crankset, while others include bottom bracket, bolts or a power meter battery.
If a listing just says “SRAM Force crankset 170 mm”, I would treat that as a starting point, not a buying decision. The model code, chainline and configuration are what keep the weight number honest.
The one number I trust most before I stop comparing
If two SRAM cranksets are within a few dozen grams of each other, I stop chasing the smaller figure and ask which one actually fits the frame, the tyres and the riding I do. That is usually the better filter than the scale.
The best SRAM crank is the one that matches the build first and the weight target second. If the geometry is right, the quoted grams become useful. If the geometry is wrong, the lighter option is just a lighter mistake.
