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Upgrade your 12-speed drivetrain with the Twenty21 10-50T Cassette, engineered for Shimano Microspline freehubs. Featuring a wide 520% gear range, robust high-strength steel construction (10-42T) and lightweight 7075 alloy large cog (50T), it delivers smooth shifting, durability and exceptional value for trail, gravel or mountain biking.
Upgrade your 12-speed drivetrain with the Twenty21 10-50T Cassette, engineered for Shimano Microspline freehubs. Featuring a wide 520% gear range, robust high-strength steel construction (10-42T) and lightweight 7075 alloy large cog (50T), it delivers smooth shifting, durability and exceptional value for trail, gravel or mountain biking.
Twenty21

Twenty21 12 Speed Cassette 10-50T - Shimano Microspline

£95.00 £129.99 27% off
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We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
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Hassle free returns - please contact us if you need to return any item.

Our policy lasts 30 days. If 30 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange.


To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.

Several types of goods are exempt from being returned. Perishable goods such as food, flowers, newspapers or magazines cannot be returned. We also do not accept products that are intimate or sanitary goods, hazardous materials, or flammable liquids or gases.

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Please do not send your purchase back to the manufacturer.

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Book with obvious signs of use
CD, DVD, VHS tape, software, video game, cassette tape, or vinyl record that has been opened.
Any item not in its original condition, is damaged or missing parts for reasons not due to our error.
Any item that is returned more than 30 days after delivery
Refunds (if applicable)

Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.

If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.

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If you haven’t received a refund yet, first check your bank account again. Then contact your credit card company, it may take some time before your refund is officially posted. Next contact your bank. There is often some processing time before a refund is posted.

If you’ve done all of this and you still have not received your refund yet, please contact us at [email protected].

Sale items (if applicable)

Only regular priced items may be refunded, unfortunately sale items cannot be refunded.

Exchanges (if applicable)

We only replace items if they are defective or damaged. If you need to exchange it for the same item, send us an email at [email protected] and send your item to: Forest Road, Hay on Wye, HR3 5EH, United Kingdom.

Gifts

If the item was marked as a gift when purchased and shipped directly to you, you’ll receive a gift credit for the value of your return. Once the returned item is received, a gift certificate will be mailed to you.

If the item wasn’t marked as a gift when purchased, or the gift giver had the order shipped to themselves to give to you later, we will send a refund to the gift giver and he will find out about your return.

Shipping

To return your product, you should mail your product to: Forest Road, Hay on Wye, HR3 5EH, United Kingdom.

You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.

Depending on where you live, the time it may take for your exchanged product to reach you, may vary.

Twenty21 12 Speed Cassette 10-50T - Shimano Microspline

Brand:Twenty21

Code:TWENTY2112SPDMS1050

The Twenty21 12 Speed Cassette 10-50T (Shimano Microspline) is designed for riders seeking a dependable, high-performance rear cassette that keeps pace with modern 12-speed drivetrains. Built with a combination of durable high-strength steel and lightweight 7075 alloy, this cassette provides an impressive 520% gear range that makes climbing steep hills easier and offers confident acceleration on flats.

Key Specifications

  • Freehub Compatibility: Shimano Microspline

  • Gear Range: 10-50T (520%)

  • Tooth Count: 10-12-14-16-18-21-24-28-32-36-42-50

  • Material: High-strength steel (10-42T cogs) + 7075 alloy (50T large cog)

  • Approx. Weight: 554g

Built to excel in a variety of cycling disciplines - from mountain biking and trail adventures to gravel rides and all-round road use - the Twenty21 cassette delivers smooth shifting performance, robust reliability and excellent value for riders upgrading or replacing their rear gear cluster.

Compatible with Shimano Microspline freehub bodies, this cassette is easy to install using standard tools and pairs seamlessly with most 12-speed Shimano drivetrains.

Ideal for cyclists demanding durability without sacrificing performance, the Twenty21 10-50T cassette is a smart choice for riders looking to extend gear range and enhance ride versatility.

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