---
title: "Technical FAQ: Oversized Pulley Wheels, long chains, and rear racks"
description: "Technical FAQ: Oversized Pulley Wheels, long chains, and rear racks"
image: https://blog.zinn.bike/hubfs/Imported_Blog_Media/DSCF7485.jpg
---
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# Technical FAQ: Oversized Pulley Wheels, long chains, and rear racks
TECHNICAL GUIDE
# Technical FAQ: Oversized Pulley Wheels, long chains, and rear racks
1 min read
Mar 24, 2021
Lennard Zinn
[velonews](https://blog.zinn.bike/tag/velonews) [ask lennard zinn](https://blog.zinn.bike/tag/ask-lennard-zinn) [technical q&a](https://blog.zinn.bike/tag/technical-qa) [technical faq](https://blog.zinn.bike/tag/technical-faq) [lennard zinn](https://blog.zinn.bike/tag/lennard-zinn)
Mar 23, 2021, 11:05:04 PM
[Lennard Zinn](https://blog.zinn.bike/author/lennardzinn)
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Chain friction in systems with oversized pulley wheels, and more solutions for mounting a rear rack on a carbon frame.
Read the full article at [Technical FAQ: Oversized Pulley Wheels, long chains, and rear racks](https://www.velonews.com/gear/technical-faq-oversized-pulley-wheels-long-chains-and-rear-racks/) on [VeloNews.com](https://www.velonews.com/).
[velonews](https://blog.zinn.bike/tag/velonews), [ask lennard zinn](https://blog.zinn.bike/tag/ask-lennard-zinn), [technical q&a](https://blog.zinn.bike/tag/technical-qa), [technical faq](https://blog.zinn.bike/tag/technical-faq), [lennard zinn](https://blog.zinn.bike/tag/lennard-zinn)
LE
##### Written by Lennard Zinn
As a frame builder, Lennard Zinn has been designing and building custom bicycles for over 42 years; he founded [Zinn Cycles](https://zinncycles.com/) in 1982 and co-founded [Clydesdale Bicycles](https://bikeclydesdale.com/) in 2017. His [Tech Q&A column on Substack](https://lennardzinn.substack.com/) follows his 35-year stint as a [technical writer for VeloNews](https://velo.outsideonline.com/byline/lennard-zinn/) (from 1987 through 2022). He is a former U.S. National Cycling Team member and author of many bicycle books including [Zinn and the Art of Mountain Bike Maintenance](https://www.bigandtallbike.com/copy-of-zinn-the-art-of-mountain-bike-maintenance.html), [Zinn and the Art of Road Bike Maintenance](https://www.bigandtallbike.com/copy-of-zinn-the-art-of-road-bike-maintenance-5th.html), and [The Haywire Heart](https://www.bigandtallbike.com/the-haywire-heart-paperback.html). He holds a bachelor’s degree in physics from Colorado College.
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