Originally Posted by unikid

If possible you want to find tandem-rated forks. Anything less than this, and you run the risk of it failing when you least expect it.

If you can't get your hands on one, then try to at least get the specs off of it so you could try to get something to match. Maybe one of the nice folks on the forum could measure theirs for you.

Then start looking for folks who might be selling 26"" tandem forks, perhaps one of the older Cannondale, Raleigh or Burley, etc.
You could also look at local ads for folks selling tandems who have converted theirs to front suspension. They may still have the original fork sitting in their garage.
Or you could always post a "want to buy" ad yourself and see who replies.

If after exhausting the above, then you might look into "dirt jumper" (DJ) forks. Surly used to make one called the "Instigator" which was tandem-rated. Very hard to find now. You can read about it here: https://www.zioncyclery.com/product/...k-157930-1.htm
You might find other Surly forks which look equally beefy to do the task.

!

Originally Posted by LV2TNDM

Unfortunately, 26" cantilever forks are getting harder to find. Harder still are tandem-rated forks. However, you should be able to find something. Assuming you have 1 1/8" threadless, you need to search for the specific dimensions you need:
26"
1 1/8" threadless, XXXmm steer tube (or longer uncut)
Cantilever bosses
XXXmm axle-crown (suspension-corrected rigid forks are longer than old school rigid mtb forks)
XX offset (you may not have many options here)

Material? You'll be choosing between steel and carbon fiber. Cannondale used to spec their mountain tandems with their Pepperoni aluminum forks. Not sure if the latest vintages were spec'd with this. So given this, you'll have options: one possibly reasonably-priced and the other stratospheric.

Wound UP Composites doesn't show a 26" fork:
https://www.woundupcomposites.com/pr...x-canti-1-1-8/
$515.00

Alternatively, you may simply want to call various tandem manufacturers to see what they offer.

Tandems East has steel forks for $275:

wwTandems East Forks & Handlebars