What do I do when I lose the tension knob on one one my reels? Is there somewhere I can get a replacement?

The manufacturer? Lews, Diawa, Shimano ? 

Most reel parts are able to be ordered as well as custom replacements available.  Would be able to provide more detailed help if you would mention the make and model of reel.

Try hedgehog studios

1 hour ago, S. Sass said:

The manufacturer? Lews, Diawa, Shimano ? 

It's a basspro pro qualifier

1 hour ago, Molay1292 said:

Most reel parts are able to be ordered as well as custom replacements available.  Would be able to provide more detailed help if you would mention the make and model of reel.

Basspro pro qualifier

12 minutes ago, Ryanrich11 said:

It's a basspro pro qualifier

Basspro pro qualifier

You will need to contact Bass Pro for an original replacement part.

Plus, for you who repair reels on your own, as a business or as a hobby, we have the most extensive reel parts inventory in the nation. We even have parts that have been discontinued. If you would like to order parts directly from us, you can call us at (417) 873-5274 Mon.-Fri. 8:00 a.m. to 4:30 p.m.