While the new rubber soles seemingly offer evolutionary potential – studded rubber soles could ultimately replace felt/studded felt, largely for economic reasons – the standard sticky rubber probably won’t replace anything anytime soon.

My recent October Caddis trip found me wearing Simms’ new StreamTread (Vibram rubber soled) Headwater boots, while Older Bro wore one Korkers Guide Boot with a plain “Kling-On” sticky rubber sole, and one with a studded rubber “Kling-On” sole.

Korkers were made for testing

I quickly discovered the plain, un-studded Simms soles worked… OK.

Well, not really.

I didn’t fall.

But I did skid. And slide. And skate.

The same soles that performed surprisingly well on the fairly flat-bottomed-but-snotty Rogue River failed miserably on the Upper Sac’s angular streambed.

Step on a rock that angled downward, and my boots were sure to follow.

If the Vibram-soled Simms wading boots are destined for wide market acceptance, then they’ll do so on the back of one of two things:

• Massive growth of fly fishermen accessing easy-wading rivers (like the Rogue or Bitterroot)
• The liberal application of Simms Wading boot studs

The Korkers Story

The Korkers Guide Boots were seemingly tailor-made for this kind of testing; the soles are interchangeable, so it was easy to stick a studded rubber sole in the left boot, leaving the plain “sticky” rubber sole in the right.

The results were (by now) predictable.

The lack of grip offered by the plain rubber sole made the right boot immensely unpopular with novice wader Older Bro, and in truth, you could actually see the difference when he waded.

His right boot didn’t stick, and his left boot did.

OK.

This was sorta expected.

Wading Boots, So Far

I’m slowly but surely working my way towards one conclusion: For general, all-around use on freestone rivers, most anglers will want to add studs to their “sticky” rubber soled boots.

Straight sticky rubber might work fine on easier rivers, and if I fished the Bitterroot exclusively, plain rubber would be enough.

And yes, for small stream work, you’ll have to pry my Patagonia Riverwalkers – the only truly “sticky” rubber soles of the lot – from my cold, dead feet.

I’ve gotten along OK on the Upper Sacramento with my plain rubber Patagonia boots, but on steeper freestone rivers like the McCloud (hard wading), and the Pit River (got insurance?), plain rubber could earn you an eventual trip to the ER.

What’s Next?

The Underground’s fulltime Wading Boot Engineer stayed up all night and added studs to the Simms boots, and the Korkers will soon be sporting one felt sole alongside the studded rubber.

As I said before, studded rubber might prove a worthwhile replacement for studded felt purely on longevity and economic grounds, but first it has to deliver near-studded felt grip.

That may not be all that difficult; my old Weinbrenner studded rubber boots worked well enough to become my everyday boots, and the new rubber soles should (hopefully) deliver better grip than those.

In other words, more to come. Stay tuned.