Trailgrams

Bolts and threads

In Mountain Bike Action magazine, I seem to see more and more bikes that appear to have bolts instead of skewers or nuts that hold the wheels. This seems to be a very good development, because skewers are basically a pain, while holes, rather than slots in frames and forks, make the wheels much more secure.

I realize that these Chris King bolts can accommodate either holes or slots, but I bet that I can remove and reinstall a front wheel in a fork with holes using bolts with 6mm hex recesses as fast as any amateur can do it with a skewer.

To make the design more acceptable and economical, however, I’d like to propose that so-called shoulder bolts with an M8x1.0 thread, like crank axles with the tapered square ends already have, be used, except the axle would have the first 10mm diameter depth without thread to fit the shoulder of the bolt so that the fork/frame does not ride on the thread.

In the past, I owned an ergonomic chair manufacturing company that used metric fasteners exclusively, and I have some experience with designs like that and with designing in ways for speedy repairs and adjustments.

My only problem here is using the 5mm hex wrench. Again, from experience, I would never design anything smaller than for a 6mm wrench, and I wish that bike manufacturers would standardize on that size for all their bolts.

Henry Keultjes
Mansfield, Ohio

 

IT BEATS SITTING ON THE COUCH 

Our friend Bill rides an e-bike! Bill is 65 and isn’t able to ride the hills like he used to. We love Bill and love to mountain bike with Bill. Now Bill can continue to mountain bike like he wants. Of note, I have not biked with Bill since he got his e-bike, but I am looking forward to my next ride with Bill. Maybe get your family member or friend (who can’t do it like they used to on the hills or have not biked in the hills) on an e-bike and go have a good time. With the popularity of the e-bikes, their own magazine will be coming so I will let the publishers shake that one out. With that said, out there on the trails, I like seeing people getting out and having fun. 

Le 

Too many categories

I’ve been looking for a mountain bike for a few weeks now, and after reading through the “2018 MBA Buyer’s Guide” and talking to friends, I’m a little frustrated. I know what I want, but, frankly, what I find frustrating is how “specialized” some of these bikes have become, or rather how specialized the industry wants us to think they are.

Dave Kees


“Trailgrams” tip of the month: Don’t focus on riding faster; focus on riding smoother. The speed will come naturally.   


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