Can you help me choose the right size?

Yes. Use our geometry and sizing section as a starting point, then visit Stretton Bikes in Ashby-de-la-Zouch for sizing advice or book a bike fitting.

Do you offer Cycle to Work on this bike?

Cycle to Work may be available depending on your employer scheme. Use the Cycle to Work button above or contact us with your provider details.

Can I collect from Stretton Bikes?

Yes — collection from our Ashby-de-la-Zouch showroom is free. Every bike is safety-checked and set up before handover.

Is finance available on Basso bikes?

Finance may be available on eligible bikes up to £5,000 over 12 months. Use the finance enquiry option or ask in store for current terms.

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Basso

Astra 105 Di2 Cosmic S Polar White

Name: Astra 105 Di2 Cosmic S Polar White
Brand: Basso
SKU: BX2331QAL
Price: 3999 GBP
Availability: PreOrder

Select options for availability

From £3,999

Was £3,999

Can a bike designed for the road still perform on dirt? Some road bikes are capable of being adapted; the Astra was created to be whate… Can a bike designed for the road still perform on dirt?

Size

Free delivery on bikes over £1,000 • £60 under £1,000

Ways to pay

Free collection in Ashby-de-la-Zouch · Free delivery on bikes over £1,000 • £60 under £1,000 · England & Wales only

Independent bike shop
Physical workshop in Ashby-de-la-Zouch
Bikes professionally checked before dispatch
Secure checkout
Workshop and after-sales support

Overview

About this bike

Can a bike designed for the road still perform on dirt?

Some road bikes are capable of being adapted; the Astra was created to be whatever you need it to be... striking the perfect balance between road racing and the rough stuff, welcome to All-Road.

The UCI Approved Astra maintains its vocation of road cycling but increases stability and comfort. It's light, but without pushing the carbon to its limits, preserving Basso's racing DNA but makes it transversal, for those who are not professional athletes, but who want to ride their bikes every day. The new frame

Can a bike designed for the road still perform on dirt? Some road bikes are capable of being adapted; the Astra was created to be whatever you need it to be.

Specifications

Sizes: XXS (45), XS (48), S (51), M (53), L (56), XL (58) XXL (61)
Frame weight: 980g

Why you'll love it

Basso engineering with a focus on ride quality and reliability.

Supplied with professional setup and safety checks from Stretton Bikes.

Expert sizing advice and after-sales workshop support in Ashby-de-la-Zouch.

Who it's for

Ideal for 1

Road riding

Ideal for 2

Sportives and club rides

Ideal for 3

Fast rolling lanes and long distances

Key technology & features

Groupset

Shimano 105 12x

Suspension

Hardtail

Basso Astra 105 Di2 Cosmic S Polar White — riding on UK trails and lanes

Built to ride

Basso Road performance

Premium bikes, expert setup, and Midlands riding from Stretton Bikes in Ashby-de-la-Zouch.

Sizing

Need help choosing your size?

Available sizes: L, L-With-Power-Meter, M, M-With-Power-Meter, S, S-With-Power-Meter, XL, XL-With-Power-Meter, XS, XS-With-Power-Meter, XXL, XXL-With-Power-Meter, XXS, XXS-With-Power-MeterColours: White

Need help choosing your size?

Basso do not publish official rider-height size recommendations. Choosing the correct frame depends on your height, inseam, flexibility, riding style and fit preference.

Get in touch and we will happily recommend the correct size before you order.

Contact Stretton Bikes

View Full Geometry+

Reach, stack, seat tube, head angle, chainstay, wheelbase, BB drop, standover, effective top tube, and seat angle measurements.

Geometry details available on request.

Delivery & collection

Collection

Collect free from our Ashby-de-la-Zouch showroom. Bikes are fully inspected and safety-checked before handover.

Delivery

Free delivery on bikes over £1,000.
Bikes under £1,000: £60 delivery.
Delivery available to England and Wales only.

Why buy from Stretton Bikes

Authorised dealer for Mondraker, Basso, Marin and Gusto

Showroom and workshop in Ashby-de-la-Zouch, serving the Midlands

Professional bike fitting and independent advice

Cycle to Work and finance enquiries handled personally

Every bike safety-checked before handover

Workshop Bike fitting Contact

FAQs

This bike is available to order. Lead times vary by brand and size — we will confirm when you enquire.

Product details

Explore more

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Road bikes

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Road bike buying guide

Practical buying advice from Stretton Bikes.

All buying guides

Expert advice on mountain, road, gravel and e-bikes.

Bike shop Ashby-de-la-Zouch

Visit our Midlands showroom or enquire online.

Bike fitting

Professional fit consultations in store.

Workshop services

Servicing, repairs, and Bosch e-bike support.

Finance options

Spread the cost of your new bike.