Bike components » Actiontec 36 tooth cog
Actiontec makes large single cogs (36 tooth and 38 tooth) for use with their titanium cogsets. However, you can order a single cog and use it with Shimano or SRAM 34 tooth cogsets. A spacer is provided, so you simply remove one of the smaller cogs and add the large one. Note that this is not recommended by the manufacturer, but several riders have reported success.
From the manufacturer:
Our Titanium Cog Sets feature our own unique “Shark Tooth” design. This tooth configuration needs no shifting ramps, delivering flawless gear changes with or without high pedal power as when climbing and downshifting. With our non gated cogs, the cog will not grab the chain and make a ghost shift. Our cogs are separate from each other. This transmits power directly to the hub without the need for a spider. This allows a change of any cog due to damage, wear or a change in your gear ratio, without changing the complete cog set. And, with our “Shark Tooth” design, every tooth has a point, not a flat on top like other cogs. So when the chain makes a shift it can’t ride the top of the flats, delaying the shift. It drops on one side or the other, completing the shift. Weight: 136 gr – 237gr.
Product website actiontec.us
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I’ve always been a big fan of lower gears, especially on a 29er, and especially when bikepacking. Throw in the extra gear you’re carrying, throw in a few days fatigue and the difference of a few teeth can easily mean the difference between walking and riding.
I’ve had really good luck with this 36 tooth cog. I use it on both of my 29ers, but it comes in especially handy bikepacking. On both bikes I removed different cogs (small ones though) to make room for the 36t and the spacer. It took a little experimenting, but it was well worth it.
Shifts to the 36t are a little rougher. Nothing too bad, but I ease up a little more on the pedals if I’m cognizant of switching to the 36. One there it’s pedaling bliss — assuming it’s sufficiently steep.
The 36t on your 29er would feel like a ‘32.6’t on a 26er, still less than than 34 many people use on their 26er.
Yes, but combine it with a 20t little ring and now you’re talking…
Actually that’s when I’m walking 😉 I’m not in that good a shape to be able to spin at super high cadence required to move faster than walking in that small of a ratio.
How’s the clearance from the rear derailer pulley?
What is the next higher gear you are running?
Clearance is OK using a SRAM X-7 rear derailer. Had to adjust the b-tension screw a bit, IIRC.
Next gear is a 34. Haven’t tried a 32.
Which smaller cog did you end up removing? What you your steps now?
I have it on two bikes and on one I removed the second smallest (13?) and the other the third smallest (15?).
Have you experienced any excessive wear/play in that cog with the free hub?
Some wear and a little play after running one for a couple years and thousands of miles. Not enough to be concerned about yet, though.
I’m going to give 1×9 a try. .
Thanks for your feedback. It’s been helpful.