Log In
← Back to all posts

The Crucial Element for Your Thin Hand Jams

by Pete Whittaker
Dec 30, 2025
Connect

Hello Cracksters

Thin cracks, they can feel impossible, right? But unlocking those narrow features is a total game-changer for your climbing.

When I mastered thin hands and paddle hands, it gave me the opportunity to rest in places where that thin part was the crux. It seriously changed my crack climbing

It all comes down to mastering just a couple of key hand shapes and movements.

 

1. Like we always say create that 'L' shape with your hand – thumb pointing outwards – for the thinnest profile. (we bang on about this L shape alot but so many people make a half effort with it and enter into the crack with the hand being too bulky).

 

2. For Thumb down thin hand it's crucial to get your thumb meat in first, fingers pointing away, and roll those fingers over the top of the thumb. (Many people go wrong as they enter finger first)

 

3. For thumbs-up ('paddle' jams), you'll want to lead with your little finger at a 45-degree angle, then execute a decisive 'chop' motion to rotate your hand past 90 degrees initially, to ensure as much as the thumb pulp enters the crack.

 

The real magic in both techniques, and something we can't stress enough, is getting that crucial thumb pulp working for you. Your starting hand position and how it enters the crack is crucial to getting it working properly for you.

So reminder…Thumb down, enter with thumb pulp first fingers pointing away. Thumb up, enter pinkie first, ā€˜chop’ the hand down and over rotate to engage the thumb pulp.

Remember on thumb-down thin hand jams try to avoid over-rotating and pushing that vital thumb pulp out, and always aim to keep your forearm aligned with the crack.

 

Want to learn more about crack climbing technique? join Global Crack School

 Join here

 
 

Responses

Join the conversation
t("newsletters.loading")
Loading...
Technique Hack from Offwidthing in Australia
Hey Cracksters, Listen to the podcast version of this newsletter here I’ve recently been out in Australia climbing and filming with Tom and Domen Å kofic (World Cup champion). We’ve been introducing Domen to some crack and trad climbing challenges—more on that very soon! But today, I want to talk about a specific route we hopped on called Fight Club. The name says it all… Ā  Mastering the...
5.5 to 5.14: A beginners guide to Elite Cracks
1. How to get from 5.5 to 5.10 (UK: Diff to E1) At this stage, the main things holding people back aren't physical strength—they are gear management and getting your basic hand jamming technique dialed in. Gear Strategy & Efficiency so much energy can be wasted on gear placing Speed up placements: Aim to place gear in 10 to 30 seconds, not 2+ minutes. Stop self-blocking: Don't place a cam righ...
A New FA in Kristiansund and the Golden Takeaway
Hey Cracksters, Listen to the podcast version of the newsletter here I recently made the first ascent of a new crack climb with Mari in Kristiansund. It was a big roof climb taking in many different crack sizes, all the way from finger jams to chicken winging. Climbing it together reminded me of one really important thing… Ā  Right, so what was that one thing I was reminded of while M...

Newsletter Archive

Find all our past newsletters with crack climbing knowledge, insights and stories, all in one place
© 2026 Wide Boyz Ltd

Wide Boyz


DOWNLOAD THE FREE GUIDE

Take control of your finances with this free 4-step guide.