Why it's important to select the correct vehicle and tyre size
Vehicle
There are a surprising number of vehicles that cannot use traditional snowchains, the types that put chain on the inside of the wheel as well as on the tread. This is usually because there is not enough space between the wheels and the shock absorbers; this can be a problem for ordinary SUVs and 4x4s as well as for high performance cars.
You will find this important information in your car handbook - please check this before using your snowchains! Our database is intended to do the basic work for you but, with so many new vehicles and tyre sizes, it should only ever be treated as a guide.
Tyre size
Please also check your tyre size - if you buy incorrectly-sized chains they will be either too tight or too loose.
Ladder track chains
The good news is that car handbooks usually only refer to "traditional snowchains". Ladder track chains such as the Polaire GRIP and Spikes-Spider range only put chain over the tyre tread, so are not subject to these restrictions. They are also ideal for use on rear wheel drives where there is minimal space between the top of the wheel and the wheel arch.
It's really important to select the correct vehicle, paying attention to the year of the manufacture
Thule RideOn 3 bike tow bar carrier no. 9503

We have been made aware that there is a compatibility problem between the RideOn carriers and the RideOn lock 957 - the lock is too tight and cannot be easily removed. We don't yet know whether the problem is with the bike carriers or the lock; we will update this page ASAP. In the meantime, please do not buy the lock. A cable lock is available, shown here at a much cheaper price than usual - this can be passed around the towing eye or hook for good protection.
The Thule RideOn 9503 is Thule's entry level 3 bike wheel support rack. As you'd expect for a rack at this price it's not a bells and whistles carrier, but it does the job OK. It fits to both 'bolt on' and 'swan neck' tow balls without adjustment - you just tighten it on with a spanner (supplied).There's a rudimentary tilt mechanism to allow you to open the tailgate without removing the bikes and the carrier. This requires two handwheels to be loosened, one on either side of the carrier. - 3 bikes maximum
- Maximum total load 45kg, and as the carrier weighs 12kg, the maximum tow ball loading should not be more than 57kg
- The maximum weight per bike is 20kg, should you have any particularly solid bikes!
- Fits frames from 22mm to 70mm, which are strapped onto the uprights
- Buy a cable lock if you want to lock the bikes to the carrier - listed below
- Can be locked to the tow ball using a 957 lock - also listed below
- Comes with standard UK 7 pin lights, i.e. no fog lights or reversing light
It makes sense when using this carrier to place a safety strap around all the bikes and the bike holder support frame. Why? The bike holders sometimes only grip around the top and sides of the bike frame, especially on irregular shaped frames, so there's the potential for the bike holder to jump off the frame, e.g when travelling over bumpy roads or speed bumps. We're therefore providing a free strap with each carrier - one strap per carrier! We've reduced the price of the carrier by 10p to allow for this. Summary: No TÜV approval, but overall good value for money.
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Technical specifications at a glance:
Max number of bikes: 3
Fits bolt on tow ball: yes
Fits swan neck / detachable tow ball: yes
Dimensions: 105 cm (width) x 75 cm (depth)
Weight: 12kg
Max load capacity: 45kg
Max weight per bike: 20kg
Tilting: yes
Integral lighting board: yes
Lighting board plug type: 7 pin (13 pin adapter available if required; shown below)
Bike carrier to tow ball lock: available (adapter 957; shown below)
Bike carrier to bike lock: no (you can use a cable lock; shown below)
Possible to tow when in use: no
Fits with a spare wheel: no
Guarantee: 5 years Useful information: The maximum permitted load you can carry is also determined by your nose weight; you will need to check you don’t exceed this before using any tow ball mounted bike carrier.
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Please click here or on the pdf symbol below to see the fitting instructions:
Fitting PDFs
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We offer our existing customers a full "Next Day if possible" spares service, and will cannibalise new stock as required to find you the parts you need. For new customers, i.e. those who have not bought from us before, we will order the parts from Thule which usually takes 2 to 4 weeks. To find the spare parts you need, please see the diagram below, identify the product codes, then choose them from the list below. If you need more than 1 of any item, change the quantities in the Shopping Basket.

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Delivery charges and arrangements:
We charge a contribution towards delivery costs, depending on what you order, where you live, and how quickly you want the goods.
These are our standard charges; there are usually surcharges for all offshore destinations and some remote postcodes - for details please see our delivery information page.
This Item (Standard sized items) |
Express Delivery |
£ 9.50 |
1 to 2 working days |
Standard Delivery |
£ 6.50 |
3 to 4 working days |
Delivery of other items
Small items & Spare parts |
Express delivery |
£ 6.95 |
1 to 2 working days |
Standard delivery |
£ 4.95 |
3 to 4 working days |
Roof boxes |
Express Delivery |
£ 19.50 |
1 to 2 working days |
Standard Delivery |
£ 14.50 |
3 to 4 working days |
Dropracks and Roof tents |
Express Delivery |
£ 19.50 |
2 working days |
Delivery times
Delivery times are calculated in working days (Monday to Friday, excluding Bank holidays).
Cut-off times for Express Delivery orders Express Delivery orders placed before before the cut-off times shown below will usually be desptached on the date of order. Express Delivery orders placed after these cut-off times will be despatched the next working day.
Small and Standard Sized Items |
Order by 4pm for same day despatch |
Roof Boxes, Dog Cages, Dropracks and Roof Tents |
Order by 1pm for same day despatch |
Delivery FAQs
When will my order arrive?
There are no deliveries on Saturdays, Sundays or Bank Holidays, except for postable items where Royal Mail has a Saturday delivery. Express Delivery orders placed on a Friday (before 1pm) should be delivered on the Monday or Tuesday, Express Delivery orders placed on a Saturday or Sunday should be delivered on the Tuesday or Wednesday. The arrangements for Very Heavy Items are different and are shown above.
What about Next Working Day delivery?
Most Express delivery orders will arrive on the next working day, if the order is placed before the cut-off time (see above). Some will arrive on the second working day if there has been a "split-delivery". So-called “split deliveries” happen when the couriers do not have enough trailer space for everything that should be moved around the UK, so they will load what they can and leave the rest for the next trailer.
Is my delivery day guaranteed?
No retailer or courier company can ever "guarantee" a Next Working Day delivery. As well as split deliveries, all courier companies occasionally have the same transport problems as can happen to everyone else, including snow blocked roads, closed roads, traffic jams, mechanical breakdown, an inability to find the delivery address, or to gain access to it if, for example, it's in a block of flats. We work with some of the best couriers in the business, and overall they provide an outstanding service.
Do I need to be at home?
We are very flexible with our deliveries and will aim to deliver to an address which suits you – this does not need to be your home address. Goods can usually be left without signature - we prefer this with roof boxes. There's a "Special Delivery Instructions" box in the checkout area where we'll ask you to choose a typical instruction and then amend it to suit your particular requirements.
Payment options:
We take the following cards, and also PayPal. Please note that the entry on your card statement will be from "The Roof Box Company".
Secure payments
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Description
Specifications
Fitting instructions and videos
Spare parts
Delivery charges and Payment options