--- title: Zinn Cycles Blog | Bike Stories, Tech Tips & Featured Rides | lennard zinn (12) description: lennard zinn | Explore the Zinn Cycles blog for technical articles, bike guides, featured models, ambassador stories, and event updates from the world of cycling. 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Read the full article at Tec... Lennard Zinn Oct 28, 2020 velonews ### [Technical FAQ: Tubeless sealant in tubulars, SRAM front derailleurs, and tire pressure](https://blog.zinn.bike/technical-faq-tubeless-sealant-in-tubulars-sram-front-derailleurs-and-tire-pressure) VeloNews technical expert examines using Mastik tape and tubeless sealant with tubular tires, how to adjust a SRAM front derailleur, and mor... Lennard Zinn Oct 21, 2020 velonews ### [Zinn test: Sunglasses tested for UV, polarization, and clarity](https://blog.zinn.bike/zinn-test-sunglasses-tested-for-uv-polarization-and-clarity) Polarized, UV protection, lens distortion — what do all these terms mean when it comes to buying sunglasses? And do they even matter? Read t... Lennard Zinn Oct 20, 2020 velonews ### [Technical FAQ: Electronic shifting, rim vs disc brakes, and Chloé Dygert’s crash](https://blog.zinn.bike/technical-faq-electronic-shifting-rim-vs-disc-brakes-and-chloe-dygerts-crash) VeloNews technical editor Lennard Zinn answers your questions about hacking electronic shifting, braking technique, and tire pressure. Read ... Lennard Zinn Oct 14, 2020 velonews ### [Technical FAQ: Miguel Ángel López’s and Chloé Dygert’s time trial crashes](https://blog.zinn.bike/technical-faq-miguel-angel-lopezs-and-chloe-dygerts-time-trial-crashes) VeloNews tech expert Lennard Zinn examines possible causes of recent crashes in time trial events. Read the full article at Technical FAQ: M... Lennard Zinn Oct 07, 2020 velonews ### [Technical FAQ: Chloé Dygert’s disastrous front-end wobble](https://blog.zinn.bike/technical-faq-chloe-dygerts-disastrous-front-end-wobble) Lennard Zinn analyzes how geometry, braking, and tire choice could have played a role in Dygert’s world championship crash. Read the full ar... Lennard Zinn Sep 30, 2020 velonews ### [Technical FAQ: Tour de France tires, flattop chains in mud, and rim surface wear](https://blog.zinn.bike/technical-faq-tour-de-france-tires-flattop-chains-in-mud-and-rim-surface-wear) Our technical expert answers questions about pro teams tracking flats and muddy, icey SRAM chains woes. Read the full article at Technical F... Lennard Zinn Sep 16, 2020 velonews ### [Technical FAQ: rim wear, tire sealant woes, mullet brakes, and fork trail](https://blog.zinn.bike/technical-faq-rim-wear-tire-sealant-woes-mullet-brakes-and-fork-trail) VeloNews technical expert Lennard Zinn answers your questions about mechanical issues and bike geometry and handling. Read the full article ... Lennard Zinn Sep 09, 2020 velonews ### [Technical FAQ: Bottom bracket alignment, pump accuracy, cable housing, and gravel frame geometry](https://blog.zinn.bike/technical-faq-bottom-bracket-alignment-pump-accuracy-cable-housing-and-gravel-frame-geometry) Our technical guru answers questions about bottom brackets, floor pump gauges, older Campy style cable housing, and frame geometry. Read the... Lennard Zinn Sep 02, 2020 velonews ### [Technical FAQ: Shimano GRX chainrings, tubeless-ready road tires with tubes, rivnuts](https://blog.zinn.bike/technical-faq-shimano-grx-chainrings-tubeless-ready-road-tires-with-tubes-rivnuts) Lennard answers questions about Shimano GRX drivetrain compatibility, tubeless-ready tires on standard rims, and how to manage sticky bottle... 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