Railblaza
C-Tug
The default recommendation in most kayak shops, and the cart with the most owner reporting behind it. Fully composite so it does not corrode, and it strips down small enough to live inside many hatches. Its weakness is the pad geometry: flat pads under a rounded hull make it strap-dependent, and strap slip is the most common complaint by a wide margin.
Planning capacity
Not enough data
We will not publish a figure we cannot stand behind.
Cart mass
4.4 kg
Packs into the boat
Yes
Folds · Tool-free disassembly
Capacity dispute
Published capacity for this cart is contradictory. We will not print a single number.
Figures we found
- 77 kg (170 lb) — Amazon listing bullet point
- 79 kg (175 lb) — Amazon listing spec table — on the same page as the 170 lb bullet
- 118 kg (260 lb) — Several specialist paddling retailers
- 120 kg (265 lb) — Other specialist retailers
- 136 kg (300 lb) — Amazon listing title — on the same page as the 170 lb bullet
Our reading
The spread is too wide to be a rounding difference, and one retail page carries three different numbers at once. The most coherent explanation we have found is that the rating is wheel-dependent: the SandTrakz sand wheels are designed to deform under load and appear to carry a substantially lower rating than the rigid Kiwi wheels. We have not been able to confirm this from Railblaza directly — their product URLs for this cart returned errors when we checked.
What we advise
Until we can confirm a figure with Railblaza, plan against the lowest credible number for your wheel option, not the highest. If your loaded boat is over about 75 kg (165 lb) and you are running SandTrakz wheels, choose a cart with a capacity you can actually verify.
Capacity by terrain
This maker publishes capacity honestly — as separate figures for separate conditions rather than one flattering headline. We calculate with the lowest.
| Condition | Capacity | Evidence |
|---|---|---|
| Standard "Kiwi" puncture-free wheels | kg ( lb) | Unverified— evidence level: Sources disagree, or the only sources are retailer listings that contradict each other. We show the conflict rather than pick a winner. |
| SandTrakz wide sand wheels | kg ( lb) | Unverified— evidence level: Sources disagree, or the only sources are retailer listings that contradict each other. We show the conflict rather than pick a winner. |
Hull fit
Pad geometry
The pads are flat. Under a rounded or displacement hull the boat contacts a narrow strip rather than sitting in a cradle, so it wants to roll and the strap becomes the only thing holding alignment. Owners regularly add foam or a shaped cradle to fix this.
- Cradle style
- Adjustable-width composite pads on a fixed cross-frame
- Pad type
- Flat moulded pads, no cradle contour
- Width adjustment
- Not published
- Scupper cart
- No
Adjustable, but no range published.
This is a strap-over platform cart, not a scupper cart.
Suits these hull shapes
- Flat / near-flat bottom
- Shallow-V
- Hard-chined
Poor match
- Rounded / displacement
- Pontoon / catamaran (twin sponson)
Documented non-fits
-
Wilderness Systems Ride 115X
Owner report: does not fit.
Single report— evidence level: One identifiable public owner account. Directional evidence only — treat as a lead, not a fact.
Wheels and terrain
Kiwi puncture-free wheels
Solid puncture-free polymer- Diameter
- Not published
- Tyre width
- Not published
Fine on ramps and firm ground. On dry sand owners describe it as "digging a trench".
SandTrakz wheels
Wide deforming tread designed to float on soft ground- Diameter
- Not published
- Tyre width
- Not published
A genuine improvement on sand, but still not balloon-wheel performance, and appears to carry a lower load rating.
Pneumatic wheel option
Inflatable tube- Diameter
- Not published
- Tyre width
- Not published
- Inflation
- Pneumatic — check maker guidance
Owners report tube and bearing quality-control failures on this option.
| Surface | Score, best wheel available |
|---|---|
| Sealed car park / boat ramp | 5/5 |
| Hard-packed dirt track | 4/5 |
| Grass / turf | 4/5 |
| Gravel or shingle | 4/5 |
| Wet / firm sand | 4/5 |
| Deep dry soft sand | 3/5 |
| Mud / tidal flat | 3/5 |
| Steps or a steep bank | 3/5 |
Judgement scale, not instrumented testing. Read the scale definitions.
Build and saltwater
- Frame material
- Reinforced composite / glass-filled polymer Multiple reports— evidence level: Three or more independent owners, in separate public sources, describe the same outcome. Sources are listed on the record.
- Corrodible structural parts
- None structural. Axle is stainless steel.
- Saltwater rating
- excellent Multiple reports— evidence level: Three or more independent owners, in separate public sources, describe the same outcome. Sources are listed on the record.
- Packed size
- Not published
- Disassembly
- Splits into hull cradle, two wheels, kickstand and axle without tools.
- Replacement parts
- good Multiple reports— evidence level: Three or more independent owners, in separate public sources, describe the same outcome. Sources are listed on the record.
- Origin
- New Zealand
- Price band
- $$
All-composite construction with stainless axles. This is the cart's strongest attribute — owners running it in salt for years report no structural corrosion. Rinse the bearings anyway.
Manufacturer does not publish a folded envelope. Owners consistently report it stows in a Wilderness Systems Tarpon / Tsunami 14 rear hatch and a Jackson Big Tuna rear hatch.
Railblaza sells the cart as separable components and replacement wheels, straps, kickstands and axles are widely stocked. Wheels can be swapped between Kiwi, SandTrakz and pneumatic without replacing the frame.
Typically NZ$230–280 / US$130–160 depending on wheel option. Checked 2026-08.
Documented failure modes
What owners actually report going wrong, with an evidence grade on each. This section exists because most reviews omit it.
Strap slips and the boat creeps
high severity Multiple reports— evidence level: Three or more independent owners, in separate public sources, describe the same outcome. Sources are listed on the record.The most-reported failure. The supplied buckle has no teeth and can pop open under load; on a slope or over an obstacle the boat slides, the cart drags rearward and can tip. Owners fix it by replacing the strap with a 38 mm (1.5 in) cam strap and threading it back through the buckle slot to lock it, and by strapping through the kayak's carry handles rather than over bare hull.
Kickstand collapses or loosens
medium severity Multiple reports— evidence level: Three or more independent owners, in separate public sources, describe the same outcome. Sources are listed on the record.On uneven ground the kickstand folds while loading. The pivot fastener also backs off over time — owners report this continuing even with a nyloc nut. Check it before every load.
Plastic strap lock can snap
medium severity Single report— evidence level: One identifiable public owner account. Directional evidence only — treat as a lead, not a fact.At least one documented failure of the moulded strap lock in normal use.
Poor on deep dry sand
high severity Multiple reports— evidence level: Three or more independent owners, in separate public sources, describe the same outcome. Sources are listed on the record.With standard wheels it ploughs rather than rolls. SandTrakz wheels improve this materially; they do not eliminate it.
Documentation gap on strap threading
low severity Multiple reports— evidence level: Three or more independent owners, in separate public sources, describe the same outcome. Sources are listed on the record.The correct way to lock the strap is not clearly documented, which is a large part of why strap slip is so widely reported.
How it pairs with kayaks we hold
Evaluated on hard-packed ground with no extra gear — a deliberately generous baseline. Add your real gear load in the finder and some of these will change.
-
Wilderness Systems Ride 115X
Rigged weight not published
Not recommended Detail -
Hobie Mirage Pro Angler 14
65.5 kg rigged
Not enough data Detail -
Hobie Mirage Pro Angler 14 360XR
67.4 kg rigged
Not enough data Detail -
Hobie Mirage Outback
46.7 kg rigged
Not enough data Detail -
Old Town Sportsman PDL 106
48.5 kg rigged
Not enough data Detail -
Old Town Sportsman BigWater PDL 132
62.6 kg rigged
Not enough data Detail -
Old Town Sportsman 120
25.4 kg rigged
Not enough data Detail -
Wilderness Systems Tarpon 120
29.3 kg rigged
Not enough data Detail
Sources (5)
- Owner review — usability issues and pad geometry — checked 2026-08-17
- Hobie forum — strap slip on wet hulls and the fix — checked 2026-08-17
- Paddling.com long-run owner reviews — checked 2026-08-17
- Payne Outdoors review — strap lock failure — checked 2026-08-17
- Snagged Line — hull fit limits — checked 2026-08-17