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Free, tracked UK delivery on orders over £10

We offer free, tracked UK delivery on orders over £10, with delivery starting from £1.99 for orders below this value. We also have a selection of premium shipping options available including timed slots, Saturday delivery and Collect+

All of our bicycles are fully built by our experienced and certified mechanics prior to delivery; all you will need to do is turn the handlebars and fit some pedals.

Bicycles are shipped from a different warehouse to other items and so may arrive in advance of any other items you have ordered.

View all Delivery Options

90-Day UK Returns for all items

We want you to be 100% satisfied with your shopping experience at Rutland Cycling, so we offer a 90-day exchange or refund on any unused item (within the UK).

We've chosen to offer products at the very lowest prices, rather than provide a free returns service. If you do need to return an item, we provide printable postage labels and collection services at a small cost for all items - including bicycles.

See our full Returns policy.

30 Day Test Ride

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When you buy a new bike at full RRP from rutlandcycling.com, you can now benefit from the added reassurance of our Rutland 30-day test ride. Once your new bike arrives, you can ride it as your own for 30 days, and we're confident you'll love it! However, if it's not right for you, we'll exchange it for another model. (There's a nominal charge of £10 for us to collect your bike - just make sure you keep the box your bike arrived in.)

On which bikes is the 30-day test ride available?
The Rutland 30-day test ride is available on all full price, non-discounted bikes available for home delivery on rutlandcycling.com. It is not available on discounted or special offer bikes, click and collect bikes, bikes bought on finance, bikes bought through Cyclescheme, or bikes bought in store. This offer is only available on bikes delivered to mainland UK addresses.

How many times can I use the 30-day test ride?
We will allow up to two exchanges within this scheme.

Full T's & C's

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At Rutland Cycling, we offer Finance on orders over £389, with 0% finance up to 24 months available on selected bikes, including some sale bikes. Visit the product page to see which finance products are available.

You can apply for Finance online or in store. To apply online, add your selected items to your basket, then checkout as normal. Select Finance as your payment method, fill in the application form, then complete your order.

See our Finance page for more information.

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eThirteen Range Extender EX Cog - Shimano 40T
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eThirteen Range Extender EX Cog - Shimano 40T

  • Cog Material - EXA+ Aluminum
  • Thickness - 5mm
  • Compatibility - 10 Speed
  • Ring Size - 40T
  • Colours - Blackout, Red, Blue
  • Weight - 70g
£40.99 was £54.95
25% off

Rutland Rewards Points earned with this item

In Stock. Order in the next hours mins for build & despatch in 0 days.

Spend £389 to Finance your Purchase

Don't worry if the item(s) you have chosen don't reach the minimum spend for finance.

You can finance your basket, providing that the items total £389 or more!

Description

Season :

Code : FW10.ER-10SHIM.40.

Brand : E.Thirteen

Weight : 1.17KG

If your doubtful about going 1x10 due to the lack of hill climbing options, then the e*thirteen Range Extender Cog is for you. With its massive size (40T), the cog is designed to replace your 15/17T cog in the middle of your cassette to create the ultimate hill climbing gear.

The advantages of using this cog are clear: less weight, no more front mech and smoother gears without the massive price tag of the latest 1x specific drivetrains.

An EXA+ anodised aluminium construction helps to resist flex under heavy power and has been shaped to work exclusively with Shimano cassettes with a 34T cog for perfect shifting performance.

Available in three colours to suit any bike.

What's In The Box

  • EX cog
  • Longer B limit screw

FAQ

Can I use the 40t EX Cog on my 36t cassette?

We don't recommend using this cog with a 36T cassette as this will compromise shift performance.

I have a short cage derailleur on my bike. Will that work?

We recommend the use of a medium or long cage rear mech to allow space for the larger cog.

Is it hard to setup the EX cog?

The installation is simple, although you are working at the extreme limits of your rear mech. If you have any problems we recommend fitting at your local bike shop.

I have a really worn drivetrain. Will the EX Cog work ok on my bike?

We recommend the use of a new chain and cassette when fitting the EX Cog to ensure good shifting performance.

What is the extra screw for?

The EX Cog is supplied with an extra long B limit screw, this may be needed for proper mech set-up. If you are unsure about setting your B limit, we recommend heading to your local bike store.

Technical Information
  • Cog Material - EXA+ Aluminum
  • Thickness - 5mm
  • Compatibility - 10 Speed
  • Ring Size - 40T
  • Colours - Blackout, Red, Blue
  • Weight - 70g
Size Guide
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My question about eThirteen Range Extender EX Cog - Shimano 40T is...
  • Will this work with 9 speed?
    Question asked by Luc on Dec 10 2014 10:06AM
    Hi Luc, This would work with an 11-36 cassette. In theory it would also work with 9 speed and a long cage but it is recommend that 10 speed is used for best performance.
    Your question was answered by ,
  • Click & Collect

    Our Click & Collect service offers all the benefits of shopping online, combined with an award-winning retail experience in one of our stores. Simply order your items, select Click & Collect and pick up your item at a time that's convenient for you - our stores are open 7 days a week. Best of all, the service is completely free.

    Don't live near our stores? Use our Collect+ service to collect your package from a location near you.

    Delivery

    Free, tracked UK delivery on orders over £10.

    We offer free, tracked UK delivery on orders over £10, with delivery starting from £1.99 for orders below this value. There are surcharges for international deliveries, off-shore deliveries and some areas of the UK. We also have a selection of premium shipping options available including timed slots, Saturday delivery and Collect+.

    All of our bicycles are fully built by our experienced and certified mechanics prior to delivery; all you will need to do is turn the handlebars and fit some pedals. Bicycles are shipped from a different warehouse to other items and so may arrive in advance of any other items you have ordered.

    Returns

    We offer a 90 day returns period for all items. Items must be returned unused and in their original packaging. Postage labels and collection services are available at a small cost for all items - including bicycles. Please read our full returns T&C's before returning items.

    Video

    eThirteen Range Extender EX Cog - Shimano 40T

    • Cog Material - EXA+ Aluminum
    • Thickness - 5mm
    • Compatibility - 10 Speed
    • Ring Size - 40T
    • Colours - Blackout, Red, Blue
    • Weight - 70g
    View full specs
    £40.99 was £54.95
    25% off
    View Options & Buy
    In Stock. Order in the next hours mins for build & despatch in 0 days.
    £0.41
    Rutland Rewards Points earned with this item
    In Stock. Order in the next hours mins for build & despatch in 0 days.

    Spend £389 to Finance your Purchase

    Don't worry if the item(s) you have chosen don't reach the minimum spend for finance.

    You can finance your basket, providing that the items total £389 or more!

    Our Verdict

    Who says you need Sram's fancy XX1 or X01 to have a wide range cassette, e*thirteen have created the perfect cog to add to your 10 speed cassette to increase your climbing prowess.

    Our Verdict

    Who says you need Sram's fancy XX1 or X01 to have a wide range cassette, e*thirteen have created the perfect cog to add to your 10 speed cassette to increase your climbing prowess.

    Add to basket

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    • kr463.58
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    • ¥4,915.01
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    eThirteen Range Extender EX Cog - Shimano 40T
    http://www.rutlandcycling.com/images/e-thirteen-extended-range-cog-multi.jpg

    If your doubtful about going 1x10 due to the lack of hill climbing options, then the e*thirteen Range Extender Cog is for you. With its massive size (40T), the cog is designed to replace your 15/17T cog in the middle of your cassette to create the ultimate hill climbing gear.

    The advantages of using this cog are clear: less weight, no more front mech and smoother gears without the massive price tag of the latest 1x specific drivetrains.

    An EXA+ anodised aluminium construction helps to resist flex under heavy power and has been shaped to work exclusively with Shimano cassettes with a 34T cog for perfect shifting performance.

    Available in three colours to suit any bike.

    What's In The Box

    • EX cog
    • Longer B limit screw

    FAQ

    Can I use the 40t EX Cog on my 36t cassette?

    We don't recommend using this cog with a 36T cassette as this will compromise shift performance.

    I have a short cage derailleur on my bike. Will that work?

    We recommend the use of a medium or long cage rear mech to allow space for the larger cog.

    Is it hard to setup the EX cog?

    The installation is simple, although you are working at the extreme limits of your rear mech. If you have any problems we recommend fitting at your local bike shop.

    I have a really worn drivetrain. Will the EX Cog work ok on my bike?

    We recommend the use of a new chain and cassette when fitting the EX Cog to ensure good shifting performance.

    What is the extra screw for?

    The EX Cog is supplied with an extra long B limit screw, this may be needed for proper mech set-up. If you are unsure about setting your B limit, we recommend heading to your local bike store.

    E.Thirteen
    E.Thirteen
    FW10.ER-10SHIM.40.
    http://www.rutlandcycling.com/e.Thirteen-Brand.jpg

    Size Guide

    Pre-Order

    With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

    You Pre-Order is prioritised (at no additional charge); meaning that, as soon as the product arrives with us, we can wrap it straight back up and get it sent out to you - it often never even hits the stock room shelves!

    Pre-Launch

    With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

    So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

    Estimated Delivery Dates

    Estimated Delivery Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

    The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery Dates provided on product pages.

    The Current Estimated Delivery Dates for eThirteen Range Extender EX Cog - Shimano 40T is
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