Stoltz Super Rollers · Authorized dealer
Boat Trailer Rollers
Non-marking polyurethane boat trailer rollers from Stoltz: bow rollers, bow stop kits, keel rollers, keel pads and end caps, sized to the bracket on your trailer and made in the USA.
- Authorized Stoltz dealer
- Made in the USA
- Non-marking polyurethane
- 30-day returns
Quick answer
What are boat trailer rollers?
Boat trailer rollers are the rollers and pads on a boat trailer that support the hull and let the boat roll on and off at the ramp. The main types are bow rollers (also called bow stops) at the front, end caps or side rollers beside the bow roller, keel rollers under the center of the hull, and keel pads that cover the frame. Stoltz rollers are made of non-marking polyurethane, which outlasts rubber and PVC and won’t mark your hull.
Shop by type
Shop boat trailer rollers by type
Pick the part you are replacing to see sizes, live prices, Stoltz part numbers and fit details.
- Front of trailer
Bow Rollers & Bow Stop Kits
Slotted V, deep V, semi V and flat bow rollers, sold alone or as complete bow stop kits with end caps and hardware.- Sizes 1 1/2″ – 4″
- Bolt 1/2″
- Center of trailer
Keel Rollers
V-shaped and flat keel rollers that spin under the keel and help the boat roll forward onto the trailer.- Sizes 5″ – 18″
- Bolt 5/8″
- On the frame
Keel Pads
12″ polyurethane pads that slide over the cross member so the hull touches polyurethane, not steel.- Widths 1 1/2″ – 3.5″
- Length 12″
- Beside the bow roller
End Caps & Side Rollers
Flat, medium bell and large bell end caps that support the sides of the bow. They also work as side rollers.- Styles Flat, medium, large bell
- Bolt 1/2″
- Front of trailer
V Bumpers (V Bow Stops)
Stoltz V bumpers, also called V bow stops, give the bow a firm polyurethane stop at the front of the trailer.- Sizes 3″ and 4″
- Full catalog
Shop All Boat Trailer Rollers
Search and filter every Stoltz roller, kit, end cap, keel roller and keel pad in one place, with live prices.Browse the shop
Roller guide
Which boat trailer roller goes where?
Use this table to identify the part you need before you measure.
| Part | Where it goes | What it does | Sizes | Mounts with |
|---|---|---|---|---|
| Bow roller / bow stop | Front of the trailer, at the winch post | Cradles and centers the bow as the boat loads, and stops it at the front | 1 1/2″ – 4″ bracket widths | 1/2″ bolt |
| End caps / side rollers | On each side of the bow roller | Support the sides of the bow so the hull stays centered | Flat, medium bell, large bell | Same 1/2″ bolt as the bow roller |
| V bumper / V bow stop | Front of the trailer | Gives the bow a firm polyurethane stop | 3″ and 4″ | See product details |
| Keel roller | Center of the trailer, under the keel | Spins when the keel touches it and helps the boat roll forward | 5″ – 18″ | 5/8″ bolt in a bracket |
| Keel pad | Directly on the trailer frame | Protects the frame and lets the hull slide with less friction. Does not spin | 1 1/2″ – 3.5″ wide, 12″ long | Self-tapping screws (not included) |
Sizing
How to find the right size in 3 steps
Most ordering mistakes come from measuring the outside of the bracket. Follow these steps and the roller will fit and spin freely.
Find where the roller goes
Bow rollers and end caps sit at the front of the trailer. Keel rollers and keel pads sit along the center, under the keel.Measure the inside of the bracket
Measure between the inside walls of the bracket, not the outside. That width is the roller size you order. For a keel pad, measure the width of the frame it sits on.Match the shape
For a bow roller, match the shape of your bow: slotted V, deep V, semi V or flat. Then pick flat, medium bell or large bell end caps for the curve of the hull.
Bow rollers by shape
Why polyurethane
Why Stoltz polyurethane rollers last longer
Most stock trailers ship with rubber or PVC rollers. Stoltz Super Rollers are molded from polyurethane, which wears longer and protects the hull better.
Non-marking
Non-marking and non-staining polyurethane, so it will not leave black marks on gelcoat or paint.Won’t split or crack
Stays tough through summer heat and extreme cold instead of drying out and cracking.No flat spots
Holds its shape after months of storage with the boat sitting on it.Abrasion resistant
Resists wear and cuts from launch after launch on rough ramps.Oil, gas and salt
Unaffected by oil, gas and salt, in fresh water or salt water.Made in the USA
Made by Molded Dimensions in Marshfield, Wisconsin. No bushings or bearings needed.
| Stoltz polyurethane | Rubber | PVC (vinyl) | |
|---|---|---|---|
| Marks the hull? | No. Non-marking and non-staining | Black rubber can mark light gelcoat | Usually non-marking |
| Sun, heat and cold | Does not split or crack | Sun hardens and cracks it | Stiffer and brittle in cold |
| Flat spots in storage | No | Prone to flat spots | Lower grades can deform |
| Oil, gas and salt | Unaffected | Oil and fuel can soften it | Resists salt |
About us
Buy from an authorized Stoltz dealer
Boat Trailer Rollers is an authorized dealer of Stoltz Super Rollers. Stoltz rollers are made in the USA by Molded Dimensions in Marshfield, Wisconsin, from non-marking polyurethane.
Every product page lists the Stoltz part number, actual measurements and what is included, so you can match your old roller with confidence. We ship within the United States, and you can return unused items within 30 days.
- BrandStoltz Super Rollers
- ManufacturerMolded Dimensions, Marshfield, WI
- MaterialNon-marking polyurethane
- Ships toUnited States only
- Returns30 days
Upgrade optionBoat2Trailer Ramp-N-Clamp automatic boat clamp- Load your boat in seconds
- Hassle-free, easy boat loading
FAQ
Boat trailer roller questions
What are boat trailer rollers made of?
Most are made of rubber, PVC (vinyl), polyolefin, thermoplastic rubber (TPR) or polyurethane. Stoltz rollers are polyurethane, which is non-marking, resists abrasion, does not split or crack in extreme weather, does not flat spot in storage, and is unaffected by oil, gas and salt. Compare the materials.
Are polyurethane boat trailer rollers better than rubber?
For most boaters, yes. Polyurethane costs more up front, but it wears longer, carries heavier loads, will not mark the hull and does not crack or flat spot the way rubber does as it ages. Rubber is the lowest cost option for light boats.
How do I measure a boat trailer roller?
Measure the inside width of the bracket the roller mounts in, not the outside. That measurement is the size you order. Each roller is made slightly smaller than its bracket so it can spin. For a keel pad, measure the width of the trailer frame it sits on.
What is the difference between a bow roller and a keel roller?
A bow roller sits at the front of the trailer and cradles the bow. Stoltz bow rollers fit a 1/2″ bolt and come in 1 1/2″ to 4″ widths. A keel roller sits along the center of the trailer under the keel. Stoltz keel rollers fit a 5/8″ bolt and come in 5″ to 18″ lengths, so the two are not interchangeable.
Is a bow roller the same as a bow stop?
Yes. A bow stop, or bow stop assembly, is the bow roller at the front of the trailer with its end caps. A Stoltz bow stop kit includes the center roller, 2 end caps, a stainless bolt, 2 washers and a lock nut. Stoltz also makes V bumpers, also called V bow stops, in 3″ and 4″.
When should I replace my boat trailer rollers?
Replace a roller when it is cracked, split, flat spotted, worn down, no longer spins, or leaves marks on the hull. Worn rollers let the hull ride on the bracket or frame, which can scratch the boat.
Who makes Stoltz rollers?
Stoltz Super Rollers are made in the USA by Molded Dimensions in Marshfield, Wisconsin. Boat Trailer Rollers is an authorized Stoltz dealer.
Do you ship outside the U.S.?
No. Boat Trailer Rollers ships within the United States only.
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