Ideal for home mechanics and riders maintaining bikes with traditional slotted chainring nuts who want the right tool instead of improvising with a screwdriver.
The PRO Chainring Nut Wrench is built for one job that can quickly become frustrating without the right tool: holding slotted chainring nuts steady while you loosen or tighten the bolt from the other side. If your current method involves a screwdriver and a lot of slipping, this gives you a much more secure way to work on older-style chainring hardware.
Its long shaft gives you extra leverage, which helps when bolts are tight, overdone or just awkward to reach. The body is steel, so it suits regular workshop use, and the integrated 9 mm and 10 mm sockets add a bit of extra versatility for small fasteners around the bike.
This is the right pick if your crankset uses traditional slotted chainring nuts rather than newer hardware with hex fittings on both sides or direct-mount chainrings. It’s a simple, purpose-built tool, but when you need it, it saves time, reduces fuss and makes chainring changes much cleaner.
Made for slotted chainring nuts
Holds the back of a slotted chainring nut in place so you can tighten or loosen the bolt cleanly from the front.
Long shaft for leverage
The extended handle gives you more purchase, so stubborn or over-tightened hardware needs less hand force.
Steel construction
Built from steel for durability and repeated workshop use.
Integrated 9 mm and 10 mm sockets
Adds extra usefulness around the bike for small fasteners, rather than being a single-purpose tool only.
Better than a flat screwdriver
A dedicated fit helps reduce slipping compared with improvised tools, making chainring jobs less fiddly.
Useful for chainring swaps
Particularly handy when replacing chainrings, where the back nut can bind and spin with the bolt.
General
Materials & construction
Compatibility
Sizing
Features
Great for
Maybe not for
Fits slotted chainring nuts and includes 9 mm and 10 mm sockets. Check your bike before ordering: some modern 1x setups and some aftermarket chainring bolt kits use hex-drive nuts instead of slotted nuts, so this style of wrench is not required for those.
vs BBB BoltGrip
A similarly focused chainring nut wrench aimed at Shimano and Campagnolo slotted chainring nuts. It’s a very compact alternative for riders who only want the basic holding function.
vs Topeak Chainring Nut Wrench
Another dedicated slotted chainring nut tool in hardened steel, but in a much smaller format with 8 mm and 10 mm box wrenches.
vs Cyclo Chain Ring Bolt Tool
A traditional chainring bolt tool designed to engage the indentations on slotted nuts and solve the same workshop problem.
Check your hardware first
This tool is for slotted chainring nuts. If your chainring bolts use a hex fitting on both sides, or your crank uses a direct-mount ring, you’ll need a different tool setup.
A proper holder makes chainring jobs easier
When the back nut spins with the front bolt, chainring removal turns into a wrestling match. A dedicated holder keeps everything aligned and usually makes the job much quicker.
Good to keep in a home workshop
You may not use a chainring nut wrench every week, but if you service multiple bikes or swap rings occasionally, it’s one of those small tools that saves a lot of frustration when you do need it.
Leverage matters on older bikes
Older chainring hardware can be tight, corroded or over-torqued. The longer shaft is the main reason to choose this style of wrench over a tiny flat holder.
Pro is a cycling component and accessory brand focused on contact points, tools and finishing kit for road, gravel, mountain bike and triathlon riders. Its range covers handlebars, stems, saddles, seatposts, bar tape, workshop tools and on-bike accessories, with product development centred on fit, function and rider feedback.
The brand is closely linked with high-performance cycling and develops products through collaboration with riders, designers and Shimano Dynamics Lab. Pro supports elite athletes across multiple disciplines, but its catalogue is aimed broadly at riders who want practical, performance-led equipment for everyday riding and racing.
