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			Why do you say the go-no go gauge is not as accurate as a ruler. If you want exact stretch, use one of the adjustable units, measure in several spots. I can't see a ruler being better. 
 
When I was riding 3 days a week 100-200 miles per week, I was cleaning the chain every week and after every wet ride. I use missing links, so popping chain off is about 10 seconds,  9 of which is finding link. Throw chain in ultrasonic cleaner. Blow out with air, lube, reinstall. Clean cassette and front crank at same time.  
 
I use Finish Line Dry for most rides and Wet for days expecting rain.
		 
		
	
		
	
			
			
		
		
		
		
		
			
				__________________ 
				James
The pessimist complains about the wind; the optimist expects it to change; the engineer adjusts the sails.- William Arthur Ward (1921-1994)
 Red-beard for President, 2020
			 
		
		
		
		
		
	
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