Those solid aluminum guards are quite rare. Very few bikes had them. I can only thing of one model of Raleigh that was so equipped. De-toothing an alloy 50+ is a great solution that would work on many brands of cranks.
I have used an angle grinder on cheap mountain bike cranks, with one or two rings swaged to the arm with 3 rings spot welded or hot riveted to each other, to make single ring cranks for 1 speed conversions. But those were always off the bike and clamped to the outdoors work bench.
But now I have visions of de-toothing with the crank still on the bike, bike upside down, an assistant turning the rear wheel backwards and me holding an angle grinder just so.
Maybe I'll consider de-toothing a suitable crank to make a toothless guard on a single speed conversion. A touch up with some spray paint to keep the rust away. I've seen quite a few other's single speed conversions with 2 or 3 rings that look very inelegant.
I had a cheap full suspension bike in the shop last year where the full suspension pivot pin lost one side and the other part worked its way out and de-toothed the inner ring while the ring kept the pin from fully falling out. I'm sure the owner was much happier riding it after I replaced the parts.
5349 Elliot Ave. Minneapolis Minnesota 55417
On Mar 22, 2026, at 2:50 PM, Tim Long <
long...@gmail.com> wrote:
Lovely, Ted.
I've a spiffy Stronglight 42 - 52 set I'm installing on the Tim-sized 531 frame that might, MIGHT come together for this year's get-together, and in keeping with things that come loose on one's Raleigh, it's a cottered version. I'll be riding with it geared on the low ring, proper for my de-minimis-ing quadriceps, without front derailleur, although having some clunker of a derailleur on the back, I suppose I could pull the chain up onto the big ring with a stick from the roadside should there arise a big tailwind...
As a zen master might say, "We'll see...."
Later,
Tim
PS: Thanks, Mark, for the lead to H Lloyd for decal sets!
On Saturday, October 4, 2025 at 1:54:30 PM UTC-5 Ted Schefelbein wrote:
Photo of project. Sharp eyed folks will note the homeless Phil Woods lock rings already installed in the BB. I have the Shimano BB spindle that will allow for that spiffy Stronglight crankset to be installed.
Ted
On Saturday, October 4, 2025 at 1:51:36 PM UTC-5 Theodore Schefelbein wrote:
I have been deep in internet sleuthing on a parted frame the was procured from our own Shirt tail Emeritus, who suggested I needed a worthy project and had several he hadn’t gotten to. I liked the idea of an early 531 frame bije, but, not to the tune (cost) of an actual RRA. If you have read this far, you likely understand what an RRA represents and why a cheapskate like me would balk at that.
The bike is an early 1950s Clubman, based on the very high P last digit serial, 22” frame, and chromed fork tips and stays, and the brazed mount for the pulley wheel.. There were just a few bare frames sold in 1952, but, most of them didn’t have the chrome on the frame. The bike would have been blue, when it was new. Someone, painted it black, and in a bit of spoofery, put RRA transfers on it. Oh well.
The paint will clean up beautifully, so, I’ll color sand the RRA transfers off and apply proper Clubman transfers. I have perused used parts, and decided against trying to track down every, single, original part. It would have had 27” wheels, and 32 and 40 hole versions seem tough to score. I have new, 26” Sun rims on hand in those drillings. I’m a believer in building wheels with new rims.John very kindly supplied a clip stem and the proper pulley wheel mount, saving me a decade or so of hunting.
Jon Hanson has been generous with his time, and, warehouse, per usual. Thanks.
Progress will be noted, as it takes place.
Ted
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