50cm Specialized HardRock c.1987 Vintage American Steel Mountain Bike Frame Set

50cm Specialized HardRock c.1987 Vintage American Steel Mountain Bike Frame SetOriginal vintage frame built in the 1980s Thoroughly checked over & photographed in detail Worldwide shipping Specialized began in the mid 70s when Mike Sinyard began importing hard to find Italian bike parts into the USA, their first branded product was a touring tyre and their first bike range in 1981 included a touring bike, a road bike and the first production mountain bike, the StumpJumper. Being first to mass produce the MTB proved to be a

✓ Original vintage frame - built in the 1980s
✓ Thoroughly checked over & photographed in detail
✓ Worldwide shipping

Specialized began in the mid 70s when Mike Sinyard began importing hard to find Italian bike parts into the USA, their first branded product was a touring tyre and their first bike range in 1981 included a touring bike, a road bike and the first production mountain bike, the StumpJumper. Being first to mass produce the MTB proved to be a master stroke and the business grew rapidly as the niche sport came to dominate worldwide cycle sales through the 80s and 90s. As one of the first companies to mass produce and develop carbon fibre as a frame material, Specialized began to dominate the road market too, their successes across road, MTB and Cross racing is unparalleled.

Introduced in 1987, the HardRock was Specialized's foray into the entry level mountain bike market. Having been the first brand to mass produce mountain bikes they went on to lead the race scene with the StumpJumper Team and then offered the more affordable range of RockHopper bikes, and the HardRock used the DNA from these bikes at a lower price point. With frames made to their design and some Specialized branded parts made in Taiwan rather than Japan to keep the cost down, the HardRock sold extremely well and is still a staple of the Specialized MTB line-up now.

In original condition with '80s graphics over the red paint, this 1987 model was made in Taiwan with a custom-gauge steel frame that offers comfort and strength. With a full complement of braze-ons for mudguards and racks, and two sets of bottle cage bosses, this is ideal for repurposing as a touring or commuter bike.

The frame's been carefully checked by one of our mechanics to confirm the alignment's correct and there's no damage to the threads. If there are any minor issues worth noting we will do so in the overview section below. Please take a good look at the detailed photos so you can see the cosmetic condition of the frame before you buy.

OVERVIEW

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Era - 1980s
Country - American
Frame Material - Steel
Tubing - Custom Gauge CrMo
Weight - 3.53 kg
Stock Code - U-F-M9V

SIZING

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Size Guide* - 0
Seat Tube (ctc) - 50 cm
Top Tube (ctc) - 57 cm
Head Tube - 109 mm
Chainstay Length - 44.5 cm
Wheelbase - 107.5 cm

*This is just a guide, not a guarantee the frame will fit as every rider is different. If you're unsure of your size we'd always recommend trying out a bike with similar frame dimensions first.

TECHNICAL INFO

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Rear Spacing - 130 mm
Front Spacing - 100 mm
Seatpost Diameter - 26.4 mm
Wheel Size - 26"
Brake Fixing - Cantilever / V-Brake (U-Brake Rear)
Bottom Bracket Thread - English/British/ISO Thread
Headset Thread - Standard ISO (24 TPI - British/Italian)
Headset Stack Height - 36 mm
Fork Crown Race - 27.0 mm (JIS)
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).

Top Tube (ctc) - this is measured from the centre of the head tube to the centre of the seat tube, along the centre of the top tube.

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.