52cm Unbranded 'Donna' NOS Vintage Steel Step-Through Bike Frame Set

52cm Unbranded 'Donna' NOS Vintage Steel Step-Through Bike Frame SetOriginal vintage frame built in the 1980s Suitable for historic cycling events such as L'Eroica Worldwide shipping These lovely quality 'Donna' dropped top tube race frames have never been finished or built up, and are available here in their raw state ready for painting. With their internal cable routing, fine lug work and neat finishing they were obviously built by a talented frame shop, although we are unsure exactly who this was. The frames also

✓ Original vintage frame - built in the 1980s
✓ Suitable for historic cycling events such as L'Eroica
✓ Worldwide shipping

These lovely quality 'Donna' dropped top tube race frames have never been finished or built up, and are available here in their raw state ready for painting. With their internal cable routing, fine lug-work and neat finishing they were obviously built by a talented frame shop, although we are unsure exactly who this was. The frames also feature downtube shifter bosses, a braze on front mech mount, neat dynamo light cable guides, mudguard eyelets and a pump peg. Chromed on the rear dropouts and drive side chainstay, and with a chromed fork they will look fantastic with a single colour or more adventurous paint job.

If you're taking part in L'Eroica or a similar vintage event, this frame is of the correct age, so you won't be disqualified for being a rule breaker!

OVERVIEW

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Condition Notes - Frame is New Old Stock, raw & un-painted.
Era - 1980s
Frame Material - Steel
Weight - 3 kg
Stock Code - U-F-S3V

SIZING

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Seat Tube (ctt) - 52 cm
(Effective) Top Tube (ctc) - 51 cm
Head Tube - 147 mm
Chainstay Length - 41.5 cm
Wheelbase - 99 cm

TECHNICAL INFO

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Rear Spacing - 127 mm
Front Spacing - 100 mm
Seatpost Diameter - 27.2 mm
Wheel Size - 700c/28"
Brake Fixing - Recessed Allen Key
Front Brake Drop - 53 mm
Rear Brake Drop - 50 mm
Bottom Bracket Thread - English/British/ISO Thread
Headset Thread - Standard ISO (24 TPI - British/Italian)
Headset Stack Height - 62 mm
Fork Crown Race - 26.4 mm (ISO)
Shifter Fittings - Downtube Braze-On
Headtube Internal Diameter - 30.0 mm
Steerer Internal Diameter - 22.2 mm (Standard)

▼SHIPPING, TAXES & RETURNS

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We've been safely sending orders around the world since 2010. There's a handy shipping calculator on the shopping cart page so you can see the cost of postage as soon as you've added it to your basket. Your order will be carefully packed and sent with tracking & insurance, we despatch most orders within 2-3 days but larger items and orders placed before the weekend can take an extra day or two to process.

We accept returns, please notify us within 14 days and ensure the item arrives back with us no later than 30 days after the order was received.

EU Customers – for orders under €150 (excluding shipping), VAT will be collected at checkout, but from 1st July 2026, due to new EU import regulations, there may also be a customs duty payable to the carrier. For orders over €150, all import fees will be payable to the carrier, with nothing collected at checkout.

USA Customers – import fees are now collected at checkout for all orders to the US, so there won’t be any surprise charges when your order arrives.

Other International Customers – local import fees may still apply, charged by your customs office or courier before delivery. These are not collected by us, so please check your local rates before purchasing.

Any applicable fees will appear at checkout.

▼HELP SECTION

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Seat Tube (ctc) - we measure from the centre of the bottom bracket shell up to the centre line of the top tube to give a consistent measurement regardless of frame design (ctc means centre to centre).

(Effective) Top Tube (ctc) - this is measured from the centre of the head tube to the centre of the seat tube, along the line where a top tube would be to give you an indication of length.

Chainstay Length - measured from the centre of the bottom bracket shell to the centre point of the rear dropout.

Wheelbase - measured from the centre of the front fork dropout to the centre point of the rear dropout.

Front & Rear Spacing - measured from the inside of one dropout to the other. The dropouts on steel frames can be stretched or squeezed a few mm but it's always best to avoid this if possible, aluminium or carbon frames should never be stretched.

Headset Threads - although it's generally recommended to match threaded parts exactly, with headsets you can technically mix and match, unless you have French or the obscure old Raleigh threads, in which case you need to stick to that type.