(Smaller bikes use wheel diameter, too). However, in a bike shop that deals with a few brands, the measurement does refer to the post of the frame (from seat to pedals). Take it for what you will.
So the correct answer is: It's best to send the gift within one month after the wedding, two months at the most. With online gift registries and mobile shopping, there is really no reason, other than finances, not to send your friend a wedding gift before or shortly after the wedding.he gift serves as a tangible representation of your affection and support of the marriage. The #1 gift etiquette rule is: If you're invited to a wedding, you should send a gift, whether or not you are able to attend.
I agree that your gift should not depend on how much it cost the couple. We had about 100 guests at our wedding and I would say the average gift we received was between $100 and $150 (closer family and friends gave more).