Hello , I recently bought a nicely built 98 Lemond Zurich. I'm a older rider living in a very hilly area
and am used to riding a triple , so I need some lower gearing. Can I go 27 or larger with a 7700
DA 9 speed(frt and rear) ? Before I start thinking of a compact I thought I change the cassette out the first. Also since I'll look for a used cassette will Ultegra and 105 work ?.
Thank you , Bruce