More Rockymounts
Contact Us
Spare Parts
Keys, Locks and Cores
Store Locator
Warranty
Types
Thru Axle
Van Tracks
Location
Vans Internal Area
Truck Bed
Mounts
DropTop
StreetRod
HotRod
Tracks
VanTracks Mounting System
LOCATION
Hitch Racks
Roof Racks
Style
For Road Bikes
For eBikes
For Mountain Bikes
For Gravel
For Commuter
Swing Away Racks
Models | Hitch
MonoRail
AfterParty
GuideRail
GigaWatt
BackStage
HighNoon FC
Models | Roof
MachTen
TomaHawk
BrassKnuckles
SwitchHitter
Other
Accessories
Add Ons
Racks
Storage
Support
Riding Style
For Commuter Bikes
For Gravel Bikes
MODELS | HITCH
ModelS | Roof Rack
Thru Axel
Locations
Van Internal
Models | FORK THRU AXle
FAQs
POPULAR PAGES
eBike Racks
Replacement Keys and Locks
SUGGESTED PRODUCTS
$549.99
Replacement Lock Pods
$22.00
$299.99
XL Hitch Bolt (For Toyota and Rivian models)
$9.00
$99.99
MonoRail Add-On
10005
$249.99
Start with two bikes and scale to three when the ride demands it. Crew Mode add-ons integrate seamlessly into your existing rack, giving you more capacity without replacing your setup. Buy once. Expand anytime.
Hitch Size Guide
Hitch Receiver Size Guide:
Measure your receiver to confirm.
Learn More about Hitch Recievers
Low stock
Available
Add to cart
Not In Stock
Store Lookup
Fast Express shipping
Lifetime Warranty
Spare Parts & Customer service
Add On expandable:
Capacity:
Fender Compatible: Yes
Yes
Hitch Size: 2" Monorail Compatible
2" Monorail Compatible
Weight: 6.3 kg
Wheelbase: 36" to 50"
36" to 50"
Lockable:
Maximum Tire Width: 3"
3"
Max weight per bike: 45 lbs
45 lbs
Min/max wheel size:
Tilt enabled:
What's included: (1) MonoRail Add-On extension (1) User manual and installation hardware
Features - Compatible with 2 inch MonoRail (expands to 3 bikes) and MonoRail Solo (expands to 2 bikes) - Lowers max weight capacity from 60 lbs to 45 lbs per tray - Secures bikes by the front wheel with no frame contact - Not compatible with fender-equipped bikes Specs - Fits 2 inch MonoRail and MonoRail Solo only - Carries expanded capacity bikes up to 45 lbs per tray - Tire width: Fits road tires up to 5.0 inch fat bike tires - Wheel diameter: Compatible with 20 inch to 29 inch wheels - Wheelbase range: Supports bikes with 36 inch to 50 inch wheelbases - Rack weight: 14 lbs (shipping weight 20 lbs)
We know you’re excited to hit the road, so we do our best to get your order out fast and keep shipping simple.
Shipping costs are based on your order total:
Place your order by 12:00 PM MT and we’ll ship it the same business day. Most deliveries arrive within 3–7 business days and you’ll get a tracking email as soon as your order is on the way.
We get it, you've lost a component or had an accident? it happens. That's why Rockymounts stocks a large range of product specific spare parts. Find all out Afterparty spare parts here.
Go to Spare Parts
$1,299.99
$899.99
$949.99
$1,099.99
$199.99
$79.99
$49.99
$59.99
$9.99
$39.99
Products made to conquer any trail
Fast Shipping
So you don’t miss the ride.
High Spec. Fair Price.
Built right the first time.
Easy Returns
Hassle free returns policy
DISCOVER
Van and Truck
CUSTOMER SERVICE
Warranty & Returns
Shipping
Privacy Policy
Terms of Service
TECHNICAL SUPPORT
Where to find Us
Become a retailer
© 2026 Rhino Rack USA. All rights reserved.
Get out there
Cart is Looking a little flat
Pump it up Here
You might also like:
Subtotal:
$0.00
Checkout
Tax and shipping calculated at checkout