Tuesday Night Tandem Ride update: My wife and I did a sedate 26.3 miler, maybe 14.6 mph or so. Her back managed fairly well. I kept it very steady and the rpms around 90 instead of our usual 95-100 so we didn't bounce any and aggravate her back. Nice weather, low 70s and maybe a 10-12 mph wind. Perfect ride for her.
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Keep the chain tight!