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2027 Keystone Carbon 310 vs KZ Sportster X 3018X

Search 2,320 floorplans from 25 manufacturers, then put your favorites side by side.

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2027 Grand Design Reflection 317RSTS floorplanGrand Design Reflection 317RSTSTravel trailer, 35′ 5″2027 Keystone Montana High Country 290RL floorplanKeystone Montana High Country 290RLFifth wheel, 33′ 11″2027 Grand Design Momentum 344M floorplanGrand Design Momentum 344MFifth-wheel toy hauler, 39′ 11″

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Key differences

Both are 2027 Fifth-wheel toy hauler models. Here's how they differ, from manufacturer specifications.

  • The Keystone Carbon 310 is 4″ longer: 35′ 11″ vs 35′ 7″.
  • The Keystone Carbon 310 is 475 lb lighter unloaded: 11,085 vs 11,560 lb.
  • The Keystone Carbon 310 lists 855 lb more cargo capacity: 5,295 vs 4,440 lb.
  • The KZ Sportster X 3018X has a 50 lb lighter hitch weight: 2,330 vs 2,380 lb.
  • The KZ Sportster X 3018X holds 6 gal more fresh water: 100 vs 94 gal.
  • The KZ Sportster X 3018X has a $1,549 lower published MSRP: $98,651 vs $100,200.
YOUR SHORTLIST
Keystone Carbon

310

2027 · Fifth-wheel toy hauler

Specs & prices
KZ Sportster X

3018X

2027 · Fifth-wheel toy hauler

Specs & prices
Floorplan
PRICING
Manufacturer price (USD)
$100,200Published MSRPChecked 2026-10-23 · Price source
$98,651Base MSRPChecked 2026-10-23 · Price source
Lowest tracked dealer price (USD)
No recently verified dealer price
No recently verified dealer price
Est. monthly payment (USD)
$914/mo15 years at 8.99% APR with 10% down, based on the MSRP. Before tax and fees.Customize this payment
$900/mo15 years at 8.99% APR with 10% down, based on the MSRP. Before tax and fees.Customize this payment
DIMENSIONS & WEIGHTS
Exterior length
35′ 11″
35′ 7″
Garage length
20′ 0″
—
Exterior width
—
8′ 4″
Exterior height
13′ 3″
13′ 5″
Shipping / unloaded weight
11,085 lb
11,560 lb
GVWR
—
16,000 lb
Listed cargo capacity
5,295 lb
4,440 lb
Listed hitch weight
2,380 lb
2,330 lb
LIVING & SLEEPING
Sleeping capacity
6
—
Slide-outs
—
—
Main bed
Not verified
Not verified
Bunk beds
✓ Yes
Not verified
Dinette
Not verified
Not verified
Bathroom
Not verified
Not verified
Refrigerator
16.5 Cu. Ft. 12V refrigerator
16 cu ft
TANKS & EVERYDAY FEATURES
Fresh water
94 gal
100 gal
Gray water
88 gal
50 gal
Black water
44 gal
50 gal
Awning length
—
19′ 0″
Shore power / electrical service
50 amp standard
Not verified
Solar equipment
SolarFlex™ Protect 220
Not verified
Outdoor kitchen
No
Not verified
Washer/dryer prep
No
Not verified
Microwave
✓ Yes
Not verified
Cooktop
3-burner range and 17" black oven
Not verified
Air conditioning
Three Chill Cube A/C's; Triple A/C Package; Ducted A/C and heat into garage
Not verified
Electric fireplace
No
Not verified
Backup camera
wireless backup camera prep
Not verified
Propane tanks
2
—
Tire size
ST235/80R16G
Not verified
SOURCES & VERIFICATION
Weight basis
Manufacturer shipping weight
Manufacturer unloaded vehicle weight
Source checked
2026-10-23 Manufacturer ↗
2026-10-23 Manufacturer ↗

Manufacturer floorplan images © their respective manufacturers. Specs checked October 19, 2026; exact-unit labels and production options may differ. “Not verified” or a dash means we have no confirmed value. “Not listed” means the applicable manufacturer equipment was checked but does not mention the feature; it does not mean “No.” “Conflicting data” means manufacturer entries disagree. “Optional” equipment is available but is not confirmed as standard. Camera prep does not confirm an installed camera. Weights are kept separate: unloaded weight, GVWR, cargo capacity, and hitch weight. Confirm every specification for the exact model year and configuration with the manufacturer. This tool does not establish towing compatibility.

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