No offense, but if you can actually get this potential sponsor to pony up almost 1K a year to cover your coaching, I will be completely astonished, and instantly hail you as the greatest BS artist to ever write a puff-piece sponsorship proposal.
Sponsorship is not a mystery, and can be summed up very easily: $ in for $ back. Before you approach a sponsor, ask yourself these questions: "what service am I going to provide my potential sponsor?" "what monetary value can I reasonably attach to the service I provide my sponsor?" The correct answer to these questions, for the vast majority of people is nothing, and 0$.
You have a bit of a resume, so you may be able to provide some alternative advertising service, but how much is that really worth? 75$ a month can buy a fair bit of advertising - or more to the point, 100 presta tubes at wholesale - my favorite bike shop item for this kind of illustration. You are, in essence, saying to the shop - "Hey - give me 100 tubes a month to ride for you." Would this be a reasonable request to make? Do you really think you would be a better investment than those tubes? Maybe so, but if not, you need to scale down your expectations.
(How many tubes a month is Steve Larsen worth, Gerard?)
Just as an example:
A jersey logo for my road team typically sells for $500-5000 a year. Size of payment determines size of logo. That gets the sponsor: placement on 18 Cat 1/2 riders, 35 lower Cat riders, an affiliation with a large junior program (parents have money...) a web page link, an average of 3-5 newspaper pictures a year, several hundred web site "mentions"/pictures, a monthly "whatthe team did" update, and advertising at the race we sponsor. Oh Yeah - also an average of 15-20 wins per season, several state championships, and the stars and stripes jersey I won last weekend with their name on it (I'm pretty happy about that one, actually :o). This is still a labor of love, money losing proposition for most sponsors.
Back when I was handling sponsorship for a component manufacturer, the first thing I looked for was the reasonableness of a proposal. Whether it was the fat Cat. 4 downhill clown who wanted free cranks, or the new division 3 team that hit me up for the same amount of gear we gave to our French division 1 team, if the proposal was outlandish, it got round-filed
Some other points:
custom sublimated tops (which almost any cash sponsor will expect) typically run $50+ a piece, with minimum orders of 25+. Most bike/tri teams spend all of the money they receive in cash sponsorship on clothing, and still wind up having to pay more out of pocket.
If the bike shop pays out in this manner, they will likely look to write it off as an advertising expense. You are now a Pro, and will need to declare this income (be very careful if you are a young athlete looking to maintain NCAA eligibility.)
If you already ride for a shops club team, why in the world would they want to offer you additional sponsorship? They've already got you... (i, personally, have been on both sides of that...)
This is absolutely the worst time of the year to hit someone up for sponsorship. The year is half over, you've already won those races without the sponsors name attached, and outdoor industry bills all come due right about now, since everybody orders with may dating at the trade show(s)...
Even after all that, Good luck - I hope you can squeeze some money out of them.
MH
Tech writer/support on this here site. FIST school instructor and certified bike fitter. Formerly at Diamondback Bikes, LeMond Fitness, FSA, TiCycles, etc.
Coaching and bike fit -
http://source-e.net/ Cyclocross blog -
https://crosssports.net/ BJJ instruction -
https://ballardbjj.com/