I would like to spruce up my fuji for a triathalon i have coming up, specifically, I need better tires. My current tire size is 37 630 27x 1 3/8.
What kind of flexibility do I have in sizing? can I run a 27x 1 1/4 without a problem? I would like to get a blue colored tire, so I look cool when I'm the last one crossing the line. Bottom line, do I have to be dead balls with the tire size listed on my existing tire?
Thanks in advance