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Saddle Fitting Solutions

Saddle Fit Problems Solved with shock absorbing shimmable pads.

High or low Wither ** Sway  Backs ** Balance ** Slip ** Soreness

All of our saddle pads come with this extraordinary ThinLine material.  Now you simply need to find the pad that fits the dimensions of your saddle.  The rest, such as color and textiles is just what makes you happy.

The high wither horse:

ThinLine Western Shimmable pads or English Shimmable Pads with a pair of Front Saddle Fitting shims will solve your problem. Horses with profoundly peaked withers also have a hollow point behind the shoulder.

ThinLine Shimmable pads provide gullet and wither clearance. Add Front ThinLine Western saddle shims or English saddle shims to your saddle and it will rest properly at the withers with additional support for hollow areas.

The Mutton Wither horse:

Saddles pitch, roll or slip forward? Non-Slip might be the first reason you purchase ThinLine but the noticeable improvement in comfort for your horse is what will really make you happy.

We suggest a BASIC ThinLine.  Or any ThinLine pad without front shims.


The Sway Back:

Bridging Shims are the answer. Stack them then remove layers as your horse develops stronger back muscles. To retain the good muscle on the top line you’ve developed continue using your ThinLine without the shims.  

Riser Pads:

If you need to lift the back (cantle) of your saddle adding a rear shim to a ThinLine saddle fit pad is your answer. 





ThinLine with or without shims protects horses and creates saddle fit. ThinLine pads will often repair small saddle fit issues without shims. If you need to add shims for lift or adjustment they are super easy.


Bridging Shim for Sway Back


Master Saddlers and ThinLine developed a shimming system designed to create custom saddle fit while also providing shock absorbing therapeutic benefits.  ThinLine saddle fitting shims are made from the same trademark foam found on ThinLine pads.  In addition, shims are easily inserted or removed and stay in place during riding and washing. 

Now adjusting your saddle also includes more comfort. 



Easily resolve saddle fit issues for horses with hollow or sway back, high withers, saddle balance, mutton withers (rolling saddles), asymmetrical fit, or sore backs.

Easy to install
Shims remain in place while washing or riding.
Front shim slips in to solve wither problems.
Shim Fully Inserted into Pad, Invisible!
Create Bridging Fit. Shock absorbing shim fills in gaps.

The full open panel allows you to place shims exactly where you need them.  Use up to three pairs of 1/4 inch shims in the same location at once.


Popular Saddle Pad Selections:

Trifecta Half Pad
High Wither Contour Ranch Pad
Endurance Drop Rig Pad
Full Sheepskin Square Cotton Dressage Pad
Dressage full sheepskin
Saddle Seat Equitation Pad






Underneath the ThinLine layer is a pocket to insert shims. If you need help with minor saddle fit adjustments, purchase your saddle pad and use it alone or add shims. Either way, your saddle will fit better and your horse will use his back better and stay sounder longer.  Shims are made of the same therapeutic ThinLine material. Once you place a Thinline saddle pad in your shopping cart you will see below your cart, Add shims to the pad in my cart. Simply add the shims you need.

Available Saddle Fitting Shims:


Front, Bridging or Rear Western Shims
Front, Bridging or Rear English Shims
Full Booster Shims


  • Front Shims: Provide lift in the wither area and are available in two thicknesses, sold in pairs.
  • Bridging Shims: Fill in gaps over the top line. Available in two thicknesses, sold in pairs.
  • Rear Shims: Lift the cantle of the saddle for perfect balance. Available in two thicknesses, sold in pairs.
  • Kits available for multiple shims.
  • Full Booster Shim: A pair of shims running the full panel will create ThinLine Plus (1/4 inch) Thickness for intense protection.

or read on to learn more:




ThinLine receives endorsements from top riders, publications, surgeons, Saddle Fitters, Veterinarians, Chiropractors, Equine Massage Therapist, and of course horses and riders.


Saddle Fitting Solutions
ThinLine Pads come with a pocket to add saddle fitting shims.

ThinLine pads and shims (made of the same amazing material as our pads) have been designed by master saddlers for English and Western Saddles.  Every pad on our site, except our basic pad, has a pocket for shimming to create perfect saddle fit.  Many top riders use ThinLine alone, without shims, to protect horse and rider backs.

The ThinLine Promise:

Regardless of your saddle fitting issue, there is a ThinLine solution to the problem.  With ThinLine on every Saddle Pad you are certain, even when your saddle has a custom fit, you are delivering the protection and comfort they need.  SHOP NOW


What the industry is Saying: 

SmartPak Loves ThinLine so much
they developed their own custom pad






SMS master saddle fitters

What Master Saddlers are Saying about ThinLine:

So many horses improve top-line muscle tone by using ThinLine Master Saddlers such as Cordia Person (CSF) educate saddle fitters on how to shim with ThinLine.  For custom saddles, fitters like Cordia, recommend Basic Ultra ThinLine Pads to protect backs and keep saddles fitting until the next check.  Ultra ThinLine will not alter the fit of a custom saddle.  ThinLine pads come with a pocket to add shims.

Kissing Spine Disease

Solutions for Equine Sore Backs, Veterinarians endorse ThinLinePlus+:

 -often the culprit of poor saddle fit- sore backs are one of the primary reasons for soundness issues. Veterinarians recommend ThinLine for horses with sore backs and as a preventative measure and as part of their therapy. Burlington Equine Veterinary Services VT: specializing in KSD Kissing Spine Disease treatment, among others recommend the ThinLinePlus+ Basic Therapeutic Pad.



International Company: Back on Track adds Ultra ThinLine to their Muscle Warming products.

Leaders of Therapeutic products for athletes & horses created English & Western pads called the Contender Saddle Pad. Back On Track with ThinLine delivers double the technology. Designed by Back on Track.  If you briefly warm up your horse, Back on Track Products can make sure muscles are loose before you enter the arena.  Coupled with ThinLine, top professionals choose this combination to save their horses for the show ring.

sms society of master saddlers

felt barrel saddle fit pad

Easy Safe Saddle Fit:

All ThinLine pads, except the basic pads, have an opening at the center bottom to easily slide in an insert. 

inserts Front Bridging and Rear SmallSaddle Fitting Inserts:

(also called shims) are made of our amazing shock absorbing foam and are manufactured with a 45-degree angle edge to ensure there is never a pressure point. Available in two thicknesses: 1/4 inch and 3/16 inch. Sold in Pairs. Stack inserts to increase lift. Once muscle tone improves simply remove the insert and keep riding in your ThinLine pad protecting your horses’ back.  Click here for English Shims.  Click Here for Western Shims.

How Does ThinLine affect Saddle Movement?

Most visually notable is how much better the saddle, and therefore the rider, stays in close contact with the horse. When pads are moving, up, down, left, right, we can only imagine how much more challenging for the horse it is to have this instability they must carry.  ThinLine does an amazing job of keeping you close and connected to your horse.  Thousands of riders will tell you how their horses’ performance improves just by adding a ThinLine Pad.

dover saddlery

Is so confident ThinLine does more for horses they designed their own pad for Hunters. The Full Sheepskin Trim with White Ultra ThinLine protects every inch of saddle area giving Hunters the best. Available only at Dover Saddlery:

  • Contour Western Ranch Pad

    Rated 4.83 out of 5
  • ThinLine Western and Endurance Saddle Pad Test Ride Program

  • Endurance Wax Tough Rider Pad

  • Add Saddle Fitting Shims to the Pad in My Cart

    Rated 5.00 out of 5
  • Western Cotton Liner Pad

    Rated 4.83 out of 5
  • Sale!

    Western Cinch

    Rated 5.00 out of 5
    $124.99 $45.00
  • western felt shock absorbing pad

    Western Pro-Tech Felt Saddle Pad

    Rated 5.00 out of 5
  • Game Changer Western Seat Maker

    Rated 4.78 out of 5
  • Sale!

    Western Liner Black Felt

  • Western Saddle Fit Shims (Pair)

  • Endurance & Drop Rigging Saddle Pad

    Rated 5.00 out of 5
  • Sale!

    Full Sheepskin Western Comfort Pad

    Rated 5.00 out of 5

Saddle Fitting Solutions