I'm doing my first duathlon at the end of June. 2.5/10/2.5 Hunstville, AL. I have alot of running experience but not so much biking. I've pulled out my 22 year old road bike that I got when I was 16 (1989)!!! It's a Giant Perigee. Dropped it off at my local bike shop for them to give it the basic tune up. I have cages on the pedals so plan on running in my running shoes and biking in them, obviously. The tech at the shop started giving me this speech about upgrades that I needed, particularly something about a different crankset, blah blah. Something about better leg motion. Really? I just want to survive this race and see if I even like doing a multisport event. Can I get by with the bike I have. How ridiculous am I going to look? Do beginners use bikes this old or am I way out of the league on this?