First Impressions: SRAM Force 1 & Rival 1 Components (Part-I)

Every few years, drivetrain manufacturers add yet another cog to our bikes’ rear wheels in hopes of attracting dollars and market share. Chicago-based SRAM has kept pace with its competition, cog-wise, but the company has also worked on simplifying drivetrains by reducing the number of chainrings. SRAM’s 1x™ (pronounced one-by) movement began in their MTB category, where it was praised for its simplicity and security. In 2014 the company brought 1x technology to cyclocross with the introduction of the Force CX1™ group. And now, with the company’s announcement of their Force 1 and Rival 1 lines, SRAM brings the 1x option to road, gravel and adventure riding.

GRAVELBIKE.com gravel grinder SRAM Road Rival 1x Zipp 30 Course
© Nils Nilsen N2Photo. Used with permission.

What Exactly Is 1x?
At the center of SRAM’s 1x drivetrain is the company’s X-SYNC™ single chainring. When combined with a wide-range cassette and dedicated clutch rear derailleur, the result is a secure, quiet system that offers a range of gears comparable to a traditional double-chainring (2x) setup. Benefits of the 1x drivetrain include less weight (approximately 175 gram savings), simpler shifting, fewer parts to maintain, and better chain control.

It’s important to note that SRAM is not abandoning the traditional double-chainring (2x) drivetrain. The company acknowledges that road 1x technology isn’t ideal for every application, and they remain committed to 2x drivetrains. The new Force 1 and Rival 1 groups complement their 2x counterparts by delivering increased chain control, simplified shifting, and reduced noise.

Is Less More?
You don’t need a PhD to figure out that a 2×11 drivetrain gives you twice as many gears as a 1×11 drivetrain. It’s obvious that 22 is more than 11, but what exactly do you give up if you switch to a 1x drivetrain? Having logged thousands of miles on SRAM’s WiFLi™ 2x drivetrains, I found myself asking that very same question when it came time to demo the company’s new road 1x groups.

SRAM’s WiFLi 2x drivetrains offer a staggeringly wide range of gears. The combination of a 50-34 crankset and 11-32 cassette have a range–or spread–of 428%. On mixed-surface (pavement, dirt, gravel) rides, I typically find myself using use most–if not all–of that range. Can a 1x setup offer the same range? In short, yes. By pairing a SRAM 44-tooth X-SYNC chainring with one of their 10-42 cassettes, the result is a gear range that covers more than 98% of the WiFLi 2x system’s range.

GRAVELBIKE.com gravel grinder SRAM Force Rival 1x WiFLi 11-speed

What’s New?
SRAM is expanding nearly all of its new 1x offerings into the renamed Rival 1 and Force 1 groups. Last year’s Force CX1 group is now known simply as SRAM Force 1. In addition to the aforementioned single-ring cranksets and chainrings, the new 1x Force and Rival groups include hydraulic and mechanical disc brakes, DoubleTap® (drop-bar) and trigger (flar-bar) shifters, 11-speed chains and cassettes, and rear derailleurs available in short, medium, and long cage versions.

When SRAM introduced the CX1 group last year, the X-SYNC chainring sizes were limited to 38 through 46 teeth (in two-tooth increments). The new Force 1 chainrings are offered in 38, 40, 42, 44, 46, 48, and 50-tooth sizes (110 mm BCD). For those riders who favor bigger gears, 52 and 54-tooth ‘rings will be available in 130 mm BCD (Rival 1 chainrings are only available in 110 mm BCD, in sizes 38 through 50-tooth). Both Rival and Force cranksets feature removable spiders. The Rival 1 (pictured below) and Force 1 X-SYNC chainrings share the same square-tooth design and wide-tooth undercut, but the Force 1 chainrings have additional beveled troughs designed to help shed mud and debris. All X-SYNC road chainrings are compatible with 130 and 135 mm rear spacing.

GRAVELBIKE.com gravel grinder SRAM Road 1x Force Rival Specialized AWOL Comp
© Nils Nilsen N2Photo. Used with permission.

In a move that’s sure to bring a smile to gravel and adventure riders, SRAM is offering two 10-42, 11-speed cassettes for the Force 1 and Rival 1 groups. Both cassettes have the same cog sizes (10-12-14-16-18-21-24-28-32-36-42), but differ slightly in construction. The Force-level cassette (XG-1180) utilizes a mini-cluster design where the three smallest cogs are CNC-machined from a single piece of steel, whereas the Rival-level cassette (XG-1150) relies on the company’s Full Pin™ technology to hold the eleven cogs together. Both 10-42 cassettes require XD-compatible hubs or drivers.

SRAM’s 1x road derailleurs incorporate the same technologies from their MTB counterparts–namely, X-HORIZON™, ROLLER BEARING CLUCH™, CAGE LOCK™, and Exact Actuation™–but in a road specific-package, including the addition of a barrel adjuster. Short cage models are compatible with cogs up to 28T, mid-cage up to 36T cogs, and the new long-cage derailleurs are compatible with cogs up to 42T. If you’re not ready to take the plunge to 11-speed world, the Force 1 and Rival 1 rear derailleurs are also compatible with SRAM’s 10-speed cassettes and DoubleTap shifters.

GRAVELBIKE.com gravel grinder SRAM Road 1x Force Rival Specialized AWOL Comp
© Nils Nilsen N2Photo. Used with permission.

Riding The 1x Setup
When SRAM invited me to their road 1x product roll-out, I assumed that I’d get some limited exposure to the new components, but there would be little in the way of hands-on testing. I was, to put it mildly, wrong. SRAM provided each journalist with two demo bikes that were outfitted with the new Force 1 and Rival 1 components. These weren’t just any demo bikes–each one was spec’d for the respective editor’s particular area of interest and expertise. My main ride was a Specialized AWOL Comp that had been kitted out with Rival 1 components, Zipp 30 Course wheels with Specialized 1.9″ tubeless knobbies, and finished off with Zipp Service Course handlebars, stem, and seatpost.

Our testing grounds were the roads and trails near Santa Margarita, California. SRAM scoped out a mixed-terrain route that would highlight the new components’ features and versatility. As such, the course included plenty of climbing and descending (see elevation profile below). Thanks to an early-morning storm, the unpaved sections ranged from peanut butter-esque mud to hero dirt. In other words, perfect testing conditions.

GRAVELBIKE.com gravel grinder ride everything SRAM CX1 Force 1 Rival 1
What goes up must come down.

Having already logged more than 500 miles on SRAM’s CX1 group, I was really looking forward to trying the new road groups’ additional chainring and cassette options. At the same time, I wondered if the long-cage derailleur needed for the 10-42 cassette would shift as crisply on the smaller cogs. Any concerns that I may have had regarding the new systems’ shifting quality and performance were quickly erased. Whether shifting up or down the cassette, the Rival 1 setup never missed a shift (even when coated with mud and grime). Additional testing will obviously be required to assess long-term durability and performance, but based on past experience with the company’s CX1 components, I have high hopes for SRAM’s Force 1 and Rival 1 groups.

Disclosure: SRAM provided airfare and hotel accommodations, but offered no other form of compensation in exchange for editorial coverage.

18 thoughts on “First Impressions: SRAM Force 1 & Rival 1 Components (Part-I)

  1. One thing to note, for those of us mere mortals – non-racer, older riders living in country with long steep hills, the 1X system provides the capability for truly low gearing. Gearing like an older mountain bike. Some of us need gearing in the 21 to 22 gear-inch range, impossible with today’s 2X road gear arrangements – especially if you covet dropped handlebars with integrated road style shifters and brake levers, and hydraulic brakes. Yes, there are older 9-speed options out there, but anything modern with 10 or 11-speeds and/or hydraulic brakes requires a compact crank and derailleur set up that negates truly low gearing.

    The bike industry has abandoned those of us that require lower gearing – except SRAM. With SRAM’s 1X, we can go as low as necessary by adjusting the chainring. Yes, you compromise top end speed with 1X, but that is a non-issue for those of us that need low gearing. Our days of riding 30+ mph while pedaling are behind us.

    1. With the SRAM system you can use an 11 speed road shifter with an MTB rear derailleur and such as the GX or X9 and obtain 11 speed, wide-range gearing with a 11sp cassette . You may even use a 40T and maybe 42T cassette to gain truly stupid low road gearing with a 2×11. 34x42T is loooow for road but I know of tourers that want to go lower.

      1. Thanks.

        We recently purchased 2015 Salsa Fargo’s, with 2X 10-speed gearing. That is, SRAM Apex brake levers/shifters and X9 Rear / X7 Front derailleurs with an 11-36 10-speed cog set. The chainrings are 28/42. The gearing is great for us riding the many long climbs in our area. The set up would be good for touring too. I run 47mm Schwalbe Marathon Mondail tires (actually labeled 47-622 and 28×1.75) on the road with this bike. Yes, I can spin out on the road on the flat with a strong tailwind, but I’m a big guy and almost 60 years old – so I will take the low gearing for climbing any day. We’ve given up on today’s 2X road setups for drop handlebars.

        The brakes are Avid BB7 mechanical – would love to figure out a SRAM 2X set up for drop handlebars with hydraulic brakes and the same gearing we have now. No bar ends for us and we love SRAM doubletap, so Shimano is not a remote consideration. Perhaps SRAM eTap will come to mtn gear sets some day and we can “shift” over then?

  2. I read the article and the chart showed a 44 tooth chainring and the AWOL at the Specialized web web site shows a 38 tooth chainring . So the production AWOL model has lower gearing . 25.2 gear inches with 44 mm tires.
    Apparently you can put a 30 tooth on the chainring to give you 19.9 gear inches with 44 mm tires and at 250 lbs and gear that would make it workable for bike packing and gravel grinding. I like the idea of a 1X

  3. I’m wanting to improve the drivetrain on my single-speed All-City Nature Boy and like the current 42×16 combination. Any reason not to consider one of these two SRAM cranks that seem designed to go with a 10-speed set up?

Comments are closed.