I have a schwinn sc-3 speedometer and a 700x35-38tre and need the code to set it to my wheel size.THANK YOU!?

Question

WHEEL SIZE IS 700X35-38. SRTEET BIKE

Answer 1

The most accurate way to calibrate your speedo is to do a roll out.

1. mark a line on a paved surface.

2. set your bike, with valve stem on front wheel pointing strait up and directly over the line - use as an index.

3. making sure your tires are inflated for riding, roll the bike in a strait line until the valve stem is point up again.

4. Mark that spot on the pavement and measure converting to mm for speedo input.

5. for best results do this a few times and average. Also, press down hard on the handlebars when rolling. This will simulate the riders weight on the wheels.

This will take 10 minutes and give you excellent results. Better than any estimate.

Answer 2

If you're lazy or not picky use a listed number (they're posted all over the web) or spend a few minutes and do the roll out like suggested above.

Answer 3

700 X 35C =  217 CM

700 X 38C =  218 CM

This should do it :)