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Here is my modified version of the KPM-12J Potentiometer. I covered the pot with two sliding carbon tubes together with two 3D printed endcaps. It adds 35g to the pot but provides a whole lot of stiffness and protection against dirt and grime 😁 I also made another short video trying to explain a bit about TRAZER for those who are interested :-)

I probably haven’t been up Cypress in 15 years and of all the days to randomly go up there to teach my son to drive stick in the parking lot…. lol

link to their site for hardline BC and PR below - https://www.redbull.com/ca-en/events/red-bull-hardline-british-columbia FOR IMMEDIATE RELEASE RED BULL HARDLINE SET TO MAKE CANADIAN DEBUT ON OCTOBER 17, 2026 Cypress Mountain, British Columbia to Host the World’s Toughest Downhill Mountain Bike Race April 9th, 2026 – Vancouver, Canada: For the first time ever, known as the world’s toughest downhill mountain bike race, Red Bull Hardline, will debut in Canada at Cypress Mountain, British Columbia. This invitation only competition will see the world’s top male and female riders come to Vancouver’s North Shore, often hailed as the birthplace of freeride mountain biking. This...

Sounds like what's needed is a roll-your-own string pot that can be built for about $10... coming soon to an open-source data acquisition project near you. Maybe. This guy runs on the bench and can either emulate an analog pot or be read over I2C. It's built around an as5600 encoder: that plus a couple of bearings, a spring from a key lanyard, a 3d printed spool and a short piece of chrome shaft pulled out of an old scanner make up the driveline. It's multi-turn which keeps it compact (and the inertia low), but at the cost of having...

The string pot works well, the only negative on ours is the mounting. The awkward shape almost always requires us to print a new mounting bracket for each bike to get proper alignment, whereas the linear pots typically can reuse mounting hardware. We just use the Aim pot but there's other options out there that might solve this issue. FYI, KTM has used the string pot on the front for years.

Yes, absolutely. The idea is that this is an open-source project. I don't have build guides etc written up for it but I am looking for people to try it out - once I've tested the new PCBs and made sure they work OK, I'm happy to send you one for the cost of postage along with a shopping list for the other minor bits required. Same goes for anyone on here as long as (1) you send me some feedback, and (2) you understand that it's still basically a DIY project - I'll provide whatever help and support I...

Follow up to this one. I serviced the fork (lower leg service) which was basically new in the last video. There was some oil in it but definitely not the amount mentioned in the manual. I also maxed out the VIVID Air with 4 tokens since the data showed (for my newbie eyes) that the shock is working way more and blows through the travel in G-Outs and impacts after small drops. Both things made a very big difference! The fork is now way more active than before and also feels even better than it did before. I also feel...

Do you need much more than on and off? And a light to indicate data acquisition.

First test build of the new logger. Same functionality as the last one (4 analog + I2C), but smaller and more tightly packaged. I'm on a mission to get the parts count (and cost) as low as I can without giving up any important functionality. The screen is a head scratcher. I find it a nice quality-of-life feature and it doesn't add much to the cost, but people seem to be able to live without having one. Feedback from users of other systems appreciated!

Since people were talking about elastic demand last week.... Lycra Company declares Chapter 11

Given Muc-off's history of intentionally flawed testing (which is the reason all their other lubes are so horrible) I don't see why we should trust them now. I'll wait to see testing results from zero friction cycling, but I doubt this is better than silca and the other good wax options.

I'm totally sold on chain wax for off-road riding in dry conditions, but hard to imagine this is worth it when all the other Muc-off lube products are so terrible.

I think the balance you have is great. The averages and 95th looks great. Personally I only give my max speed a glance but I hardly tune for it. The reason being is that if everything else looks good, you are tuning your whole run for one max speed that could be on a drop or big hit. So in reality you’d be stiffening your bike the entire run just for 1 split second. but to answer your question, my max speeds hit 5000-7000 depending on the track. But really the best is to try all the combinations you can...

I also was able to jump on the bike today before the rain comes back tomorrow. Here is a video of a short test ride on my hometrail with the new rear sensor (link arm driven rotary encoder, measuring rear wheel travel directly over the rear triangle). I strugle a bit to get my rear shock matching up with the fork. No matter what I do, the rear rebound is always a touch faster than the front (even completely closed up...). It also seems like the LSC is not doing enough, even almost fully closed at 4/5 clicks. The max...

Work continues on the analysis pipeline for my data logging project. While I have ambitions beyond these kind of basic descriptive statistics, it seemed worthwhile to replicate some of the charts and metrics that seem to be widely used in analysis of suspension data. These, like all my data analysis tools, are built in Jupyter Lab. I have separate notebooks for pre-processing the raw logger data (detecting inactive periods, calculating velocity and acceleration, calculating normalised displacement, low-pass filtering and event detection, assigning semantic roles to data series and stashing it all in a library) and for other general-purpose visualisations that...

I have been seeing the request for leverage curves for offset-mounted linear sensors come up quite a bit more in the last 12 months. If you don't want to calculate this manually I finally got around to actually surfacing this functionality in the UI. The basic process is: - measure your sensor eye to eye length at full extension (or what you want full extension to be, recommended to have a little buffer) - enter the stroke (only required for the visualization) - drag or enter the position points. For convenience the length is fixed and you can just move...

Per a DM request, I've put my sensor mount designs in a Google Drive folder, here: https://drive.google.com/drive/folders/1rIsdjYRYZxvGNPqRv1Ob1g5by7T4zd1… These folders contain files for 3d-printed linear potentiometer mounts. They were principally developed for my bike - a 2022 Stumpjumper Evo with a Vorsprung Telum shock and Fox 38s - and the particular linear pots I am using (12.7mm / 1/2" dia), but may be adaptable for others. Included are both the mesh (STL) files, which all 3d printer slicer software should be able to cope with, and the Fusion design files (.f3d) in case you want to modify them. (Warning: the timelines...