
Jim’s Tech Talk
By Jim Langley
We have a bit of catching up to do this week. The last Tech Talk, which you can read here was actually a rerun from 2018.
A reader named “Walt” commented and expressed surprise that it was a previously run Tech Talk. So I’ll explain for him and anyone else curious about this that we do that when the writer (yours truly in this case), is off riding (or perhaps something equally important) and can’t get a new column done in time to meet the weekly deadline.
We try to pick topics for these reruns that are still current and that have value. And because all online columns stay available to read and comment on, there’s usually added value in the remarks, tips and questions that come in over the time they’ve been live.
In the case of the last Tech Talk, the column was about fixing a loose cassette. But, interestingly many of the comments were about other cassette issues. So, with the comments, it became an even more helpful resource for anyone searching for cassette help who discovered the article. That’s one of the best things about the Internet in my opinion.
CASSETTE TOOLS TALK
This week, I’d like to add more value by recommending some cassette tools I use and recommend. And answer a compatibility question.
Abbey Bike Tools
The first tools are by Abbey Bike Tools. Abbey has earned a reputation for making excellent bicycle tools and one of their specialties is offering lightweight and compact ones favored by pro mechanics because they weigh less and take up less room in a toolbox.
The clever thing about their cassette tools is that one fits inside the other. Their Whip-It Chain Whip ($45) is the tool that you hold to keep the cassette from turning. And their Crombie Tool ($40 and up depending on which model you purchase) is their cassette lockring tool for both loosening the lockring (chain whip required) or tightening it (chain whip not required).

Pedro’s Vise Whip II
If you own a chain whip tool, you might have had it let go just as you push down hard on the lockring tool. This can be dangerous because your knuckles are close to the sharp and usually grimy teeth on the cassette cogs.
If you work carefully with a good quality chain whip it might never slip. But accidents can still happen. And, for just these reasons, Pedro’s came out with their Vise Whip ($69.99) Vise Whip II » Pedro’s NA (pedros.com).
The advantage of Pedro’s cassette holder is that it’s a plier tool that locks on to a cog. This means as long as you’ve adjusted the jaws and locked the tool closed, it will not slip.

Note that Feedback Sports and Park Tool also make cassette pliers of a different design from Pedro’s. Feedback’s are $45: https://www.feedbacksports.com/product/cassette-pliers/ and Park’s are $48.95: CP-1.2 Cassette Pliers | Park Tool.
Torque wrench
A reader named “Katharine,” commented that the best way to ensure your cassette stays tight is to use a torque wrench to tighten it. That’s great advice. She points out that the torque required is often printed right on the lockrings – 40Nm was on the one I tightened this weekend.

The torque wrench I use is Park Tool’s TW-6.2 ($124.95, which can torque from 10-60Nm TW-6.2 Ratcheting Click-Type Torque Wrench — 10 to 60 Nm | Park Tool. This torque wrench accepts ⅜-inch drive sockets.
In order to torque cassette lockrings, you’ll also need the correct cassette lockring tool for your cassette – one that fits onto the torque wrench. Some types of cassette lockring tools accept a ½-inch drive in their center. For these you’ll want to purchase a ⅜-inch to ½-inch adapter in order to fit a ⅜-inch drive torque wrench into the cassette tool (luckily these adapters don’t cost very much).
Or, if you have the cassette lockring tool that doesn’t have a square hole for a ½-inch drive, that tool can be turned with a 1-inch socket that fits your torque wrench. So, once you get your torque wrench, choose the right setup that works with it and you’ll be set.
Cassette tool compatibility
Lastly, I wanted to answer a reader named David’s question. He asked if a Dimension cassettes can be removed with a Shimano cassette tool?
I haven’t ever seen a Dimension cassette, so I Googled it and found one. And what I looked for was its compatibility. Here’s what I found: https://www.modernbike.com/dimension-cassettes.
In the description it says, “Dimension cassettes feature Shimano/SRAM compatible spacing and fitment,” which tells me that it takes the Shimano cassette removal tool.
It’s good David checked because companies have been known to make components that require proprietary tools. By going with a tool that is already available and in the hands of many cyclists, Dimension made things easier for everyone.
Many thanks to all who left comments with tips, tool suggestions and questions!
Ride total: 10,022
Jim Langley is RBR’s Technical Editor. A pro mechanic & cycling writer for more than 40 years, he’s the author of Your Home Bicycle Workshop in the RBR eBookstore. Tune in to Jim’s popular YouTube channel for wheel building & bike repair how-to’s. Jim’s also known for his cycling streak that ended in February 2022 with a total of 10,269 consecutive daily rides (28 years, 1 month and 11 days of never missing a ride). Click to read Jim’s full bio.
Jim, will you be able to provide details on how to measure the wear on a cassette and any tools in the market that can gauge when it cassette needs to be replaced. This will be very useful to know.
That’s a good idea, Gilbert. Thanks for the suggestions. I might do it next week. Thank you!
Jim
Actually, I was not complaining that the article was a repeat…I was just surprised when I noticed some comments which were dated some time ago.
Jim’s columns are my favorite read as I am a diy bike mechanic who services many bikes in our community and, since I do not want a business/hassle with taxes, provide my time at no cost. I find that working on bikes provides a great diversion from the daily issues/pressures we all face.
Thanks again Jim.
Thanks a lot, Walt. That’s nice of you to fix bicycles for free to support your community. Sounds like a win win 😉
Jim
Hi Walt! When I read your comment above it sounded a lot like me. I, too, am an intermediate bike mechanic who helps out family and friends at no charge other than parts. Lately the focus has been restoration of very neglected bikes from the 1980s since finding bikes right now isn’t easy. I learn something new with every bike restoration I do. I’m lucky enough to have an enormous, well equipped workshop in my cellar and it’s definitely the heart of this home. I went to the Appalachian Bike Institute in Asheville, NC, in 2018 to enhance my knowledge, but the best education comes from just digging in and a call to my buddies at my LBS when needed. Wrenching bikes is good for the soul.
“Wrenching bikes is good for the soul.” I like that, Katharine 😉
Feel free to use that comment liberally, Jim 🚲👍🏻🙂. And how delightful to see my input in your newsletter. Thanks!
Repairing bikes for others is rewarding in many ways. I am sometimes asked why I do not start a business/charge for my time. My answer is that my reward is seeing riders smile when their bike works well again and joy in keeping others riding. Also find joy in fixing up older bikes to donate to veterans and the local woman’s shelter.
Katharine: Good on you…and envy your large workshop. Unfortunately, my workshop is a small space in the garage…but, it gets the job done.
I’ve been told the same thing about starting a little business and charging people. I don’t want to get into that. Like you, seeing their faces when they get their bike back and it’s working properly again is its own reward/payment. I live in Central New York in utterly flat farmland where there’s plenty of charity rides, etc., that goes right by my home. Thinking of putting up a sign 500 ft. away in each direction offering air, quick look-see and repair, etc. If someone wants to toss me a few bucks for a fix I won’t refuse it – put it toward another bike tool.
Sounds like your garage set up works just fine and so nice to help others enjoy a ride 👍🏻🚲🙂.
Rohloff makes a very useful cassette checking tool. Used it for years.
Jim, I too am interested in measuring cassette wear. I’m looking forward to hearing what an expert such as yourself has to say. My desire is to spend the least amount of money replacing chains, cassettes, and chain rings. Wear on each one influences wear on the other two, so everything is a trade-off. Thank you for sharing your knowledge, research, and opinions. ~ole
I’ve done most of my bike maintenance over the last 40+ years, including changing and replacing cassettes. When it comes to tightening the cassette, I have never torqued it after using a large crescent wrench because it is my view that the cassette is going to get tightened as much as it needs just by riding. Am I missing something?
Henri: I do much the same as you. Just tighten with wrench until tight/no torque wrench even though I have one…the action of pedaling keeps the cassette tight as long as it starts out tight. Never had an issue.