Fixed Gear W/ Sliding Dropouts?
11-15-17 | 01:06 PM
#1
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Joined: Nov 2017
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Fixed Gear W/ Sliding Dropouts?
Hey
I'm trying to build a new fixed cross frame, and I'm wondering if there's any issue with running a fixed gear with sliding dropouts? I'm mainly worried that skidding forces might pull the dropouts forward. If you have any experience with these setups please let me know how it went. I haven't seen any online so it guess it's not common practice.
-thx
I'm trying to build a new fixed cross frame, and I'm wondering if there's any issue with running a fixed gear with sliding dropouts? I'm mainly worried that skidding forces might pull the dropouts forward. If you have any experience with these setups please let me know how it went. I haven't seen any online so it guess it's not common practice.
-thx
11-15-17 | 01:12 PM
#2
Senior Member
Joined: Apr 2009
Posts: 39,897
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From: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Actually driving chain tension will exceed braking chain tension because of the rear wheels ability to skid with less force than what's needed to do a wheelie. It's a question of geometry and basic physics.
Since driving tension is inversely proportional to chainring size (leverage), and guys use these dropouts with small myn bike triples, I'd have no concerns about using them with a large chainring, fixed or free.
Since driving tension is inversely proportional to chainring size (leverage), and guys use these dropouts with small myn bike triples, I'd have no concerns about using them with a large chainring, fixed or free.
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FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
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