I bring my 40+ years of experience building bike frames and forks, riding bikes, and writing about bicycle technology and maintenance to answering your questions. I have no advertising nor an ad sales staff asking me to go easy on advertisers.
| Platform |  | Pricing | Freemium | Publishes | Weekly |
|---|---|---|---|---|---|
| Issues | 140 | Founded | 2 years ago | Last Issue | 7 days ago |
| Active | |||||
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lennardzinn.substack.comLatest Issues
How to check for cassette wear (and chain wear)
Dear Lennard,
My road bike du jour, with Di2 12 speed has almost 20,000 dry weather miles with waxed chains.
Do I just eyeball the chainring and cassette teeth, or what is a more objective method of measuring wear?
Jeff
Dear Jeff,
Eyeb...
Chain waxing and adjusting a 12-speed Di2 front derailleur
Dear Lennard,
Probably a typo, but on step 7 on your August 24th post, that should be the inner plate that you get within 0.5mm of the chain, not the outer.
Danny
Dear Danny,
Thanks so much for catching that! I fixed it just now. Indeed...
Grand Canyon Flash Floods
Dear Readers,
Knowing I was rafting the Grand Canyon, some of you wrote me with well wishes after hearing about the devastating flood that came down Bright Angel Creek on August 29, killing three hikers, wiping out much of Phantom Ranch, a...
Tomorrow We Must Come Out of the Grand Canyon
Dear Readers,
Today I am 15 days into my current trip down the Colorado River through the Grand Canyon. As trips during the main season are limited by the Park Service to 16 days, we are required to take out tomorrow (it used to be 18 days...
Hi Again from the Depths of the Granite Gorge in the Grand Canyon
Dear Readers,
Today I am eight days into my trip down the Colorado River through the Grand Canyon.
I expect that today we will run Crystal Rapid at river mile 98. It formed in 1966 when Crystal Creek flooded. It features a huge hole in th...
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Authors
The writers behind this newsletter.
Since 1982, LENNARD ZINN’s built custom bikes: zinncycles.com. He is author of Zinn & the Art of Mountain Bike Maintenance, Zinn & the Art of Road Bike Maintenance, The Haywire Heart, and countless VeloNews tech articles.
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