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🚴♂️ Unlock your bike’s transport potential—no frame left behind!
The Allen Crossbar adaptor bar is a durable alloy steel solution designed to add a top tube to step-through, suspension, BMX, and women's style bikes, enabling secure transport on standard bike racks. Featuring an internal spring for constant tension and plastic-coated hooks to protect your bike’s finish, it fits frames with 18" to 27" between headset and seatpost. Backed by a lifetime warranty, this adaptor ensures hassle-free, damage-free bike transport for diverse frame styles.






| ASIN | B000ELSSZE |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | #14,434 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #3 in Bike Car Rack Accessories |
| Brand | Allen |
| Brand Name | Allen |
| Color | Black |
| Compatible with Vehicle Type | Bicycle |
| Customer Reviews | 4.7 out of 5 stars 16,920 Reviews |
| Included Components | Bicycle Adaptor Bar |
| Item Dimensions | 21.65 x 7.09 x 6.69 inches |
| Item Type Name | Bike Frame Adaptor |
| Item Weight | 500 g |
| Item dimensions L x W x H | 21.65 x 7.09 x 6.69 inches |
| Load Capacity | 35 LB |
| Manufacturer | Allen Sports |
| Manufacturer Part Number | 900B |
| Manufacturer Warranty Description | If an Allen Rack fails to function properly due to a defect in workmanship or material over the lifetime of the original purchaser, simply return the product with your original receipt, and Allen will repair or replace the rack free of charge. This warranty does not cover damage or wear which occurs as a result of day to day use or general wear and tear |
| Material | Alloy Steel |
| Material Type | Alloy Steel |
| Model Number | 900B |
| Mounting Type | Bicycle Mount |
| Number of Items | 1 |
| Number of Packs | 1 |
| UPC | 765271900007 |
| Unit Count | 1 Count |
| Vehicle Service Type | Bicycle |
D**N
Gamechanger! This rocks
Works perfectly, I'm so glad to have found this! I have an older ebike and it really heavy. My bike rack sits high up on the back window of my car so I have to really high to put it on. The bike has a curved frame, so I would have to put one side on and then try to lift up enough to put in the other side. Then, of course, the handlebars would turn and hit me in the face, knock me off balance and I'd have to start again. The first time this summer loading took over a 1/2 hour, super frustrating. I was shopping new racks and I stumbled onto this device. Total gamechanger! Last trip took 2 tries leaving and 1 try coming home, this thing is great!!!
J**C
Solves the problem that Tule and Yakima don't!
Oooof - I had no idea that installing a bike carrier on the back of the car would be so fraught with niggles and frustrations. Just as my husband was about to return the whole shebang to the store, this Allen Sports top tube saved the day! We tried both the Tule and the Yakima before this but neither were adjustable and the hooks were way too big, causing them to slide all the way up until they met resistance - under the saddle on one side and under the handlebars on the other. This wouldn’t have been a problem if the handlebars and saddle were at the same height, but because this is a hybrid trail bike and not a racing bike, my handlebars are higher than the saddle, causing the top tube to sit on the diagonal. When placed on the bike rack, the angle caused the bike’s front wheel to hang lower than the trailer hitch without enough clearance. Because the Allen Sports top tube is adjustable and because the hook is so much smaller, with the help of a $1 split ring from the plumbing aisle of our local hardware store serving as a stopper on the handlebar stem, we were able to get the bar to sit horizontally. The result is that the bike finally sits alongside my husband’s traditional frame bike and we can carry both on the back of the rack. And the Allen Sports model was a third of the cost of the Tule and Yakima bars!! Yay and thank you Allen Sports!!
B**E
Easy to use Great product
Worked perfectly to put my cruiser bike on the car rack. Without it was a struggle. If you have a beach cruiser bike it’s worth the money. So easy to use too
E**S
Simple Fix for Carrying Step-Through or Cruiser Bikes — Works, But Feels Basic
Simple Fix for Carrying Step-Through or Cruiser Bikes — Works, But Feels Basic The Allen Sports Crossbar Adapter does exactly what it’s supposed to: it adds a temporary top tube to bikes that don’t have one — like step-through, women’s, or full-suspension frames — so they can mount securely on standard hanging-style bike racks. It attaches between the seat post and handlebar stem using spring-loaded hooks, which makes setup fast and tool-free. Once in place, it provides a stable connection for transport. The internal spring holds tension well, and the plastic-coated hooks prevent paint scratches. It fits most adult bikes comfortably, though the bar has a somewhat utilitarian feel — it’s more functional than refined. The spring mechanism can feel stiff at first, and smaller riders may need both hands to stretch it into place. Still, for the price, it’s hard to beat. It solves the fit problem perfectly for beach cruisers and step-through bikes, and it holds up fine for occasional use or road trips. Bottom line: A basic but reliable adapter that makes nontraditional frames rack-compatible. Not fancy, but practical and affordable.
L**Y
Great for use with the RV bike rack
Worked out well it kind of converts a girls bike to a boys bike so you can hook it to a bike rack on the back of a RV bike rack and then you can take it off when you go to use it
E**Z
bike rack crossbar
need this when hauling bike woth no cross bar, needed to hold bike down, expandable and works great, this has to be bought separately when buying a bike rack to haul bikes like a step thru
K**K
Good product
Allows proper fit for step through / ladies bike to fit on Allen carrier. Good product, easy to install.
P**V
Necessary for step thru to mount on conventional bike rack.
Nice quality. Easy to install.
M**I
Good for ladies bikes on trunk racks
Works well for ladies bikes! I’m not sure I would’ve got away with using a trunk bike rack on my Golf if it wasn’t for this, as the bike would’ve been very crooked and close to the ground. If you don’t have a hitch and need a truck rack for a hatchback or smaller car, I highly recommend this for a more comfortable and secure fit. However, If you drive an SUV, I’d say it’s more preference if you want it to be level on the rack or not! (By the way, I bought this along with the Allen Sports truck rack)
F**O
Does the job - no issues - Perfectly stable
The bar work perfectly, used it on both my wife's bike, including the electrical one. no issues
I**K
Perfekt
Passade perfekt , bra att veta att den passar på elcykel
J**A
Sehr Gut
Einmal ausprobieren bin zufrieden hält super Preis passt alles Gut
F**D
Good Quality
good.
Trustpilot
2 months ago
2 days ago