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RACE CONTROL

Transponder: how a part earns its page

A transponder tells the timing loop exactly who went past and when. This page does the same for the catalog: what is on the site, where the numbers come from and how old they are.

What gets listed

Everything in the current Pro-Line range that our retail partner stocks and prices. We do not list other manufacturers' parts, and we do not list a Pro-Line item that has no price, because a page with no price wastes your time.

Where the numbers come from

Prices, ratings and review counts are read from the live listing for each item. Ratings are whatever other drivers gave — we do not filter them, average them differently or hide the bad ones.

Stock labels

  • In stock — our partner had it on the shelf when we last looked
  • Low stock — it was down to the last few
  • Pre-order — it is announced and dated but not shipping yet
  • Out of stock — we keep the page and the last price we saw, because stock returns

Reviews on item pages

The driver reviews quoted on item pages are real, published reviews for that exact item, copied word for word. We pick recent ones that describe how the part behaved. We do not write them, edit them or pay for them.

Built in the USA

Compounds mixed, molds cut and shells formed by our own team.

Sizes that stay in production

Popular Pro-Line sizes are kept on the shelf, not retired after a season.

Ratings we did not write

Scores and counts are read off the live listing, never adjusted by us.

Fitment printed in the name

Size, hex and offset in plain text so a wheel bolts on first time.