SBDU Ilkeston Reynolds 753 Raleigh Pursuit Frame SH377T – Cleaned and Documented

SH377T SBDU Reynolds 753 Pursuit Track Frame Head Tube Detail

Every new addition gets a good clean and although it was already looking quite good, SH377T still needed a bit of work. Wet oil and grease on the surface of a tube will attract dirt and dust, and that is all that was covering this frame. When a frame is clean I can measure and document it. SH377T is a curious frame and I’ve looked forward to getting to this stage in my process.

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SBDU Ilkeston Reynolds 753 Raleigh Pursuit Frame SH377T – New Arrival

SH377T SBDU Reynolds 753 Pursuit Track Frame Paintwork

eBay… it is a place I try to avoid. I like to find bikes and frames that haven’t had much exposure to the internet. eBay links containing interesting vintage bikes are shared across social media, and before you know it, the item has been seen by thousands and hyped up to a point that the auction escalates and bidders get into a frenzy pushing the prices up beyond anything sensible. I enjoy the hunt, searching and discovering SBDU bikes that have been hidden away. But I do keep an avid eye on eBay and every now and again a little gem crops up to pique my curiosity. SH377T was listed with no reserve and a low starting bid so I saved it into my ‘Watch List’ thinking it would go the way of so many others and spiral out of control… but it didn’t!

SB3505 1980 SBDU Ilkeston Reynolds 753 TI-Raleigh Team Pro – Geometry and Design

SB3505 1980 SBDU Ilkeston TI-Raleigh Team Pro Reynolds 753 Geometry Check

The SBDU seemed to stop using their H reference towards the end of 1979, meaning the frames coming out of Ilkeston at the beginning of the 80s would only have the SB frame number stamp and nothing to identify a frame as somehow different. I guess from this point on, the only reference to a specific build or geometry would be shown on the paperwork and build sheets that followed the frame and fork through its production, eventually ending up in Ilkeston’s records. If your frame does have an H reference then you still really have no idea what the ‘H’ was all about unless you have original documentation;  that is why I try and measure, document and figure out all my frames.

SB1500 1977 SBDU Ilkeston Reynolds 753 Time Trial Special – New Arrival

SB1500 1977 SBDU Ilkeston 753 Time Trial Special Original Paint

I have several frames and bikes in my SBDU collection that constantly vie for top spot. Should top spot go to JR178T, my Jan Raas frame? Should it be SB632, the earliest known Reynolds 753 SB numbered Track frame; the Beryl Burton connection on that frame alone should surely make that a contender? What about the bike that started all this blogging, SB4059, my immaculate 1980 Team Pro 753, or how about SB6398, a time capsule of an original bike with a 753R SBDU frame and a complete Campagnolo Super Record 50th Anniversary Group. Then there is the rare SBDU 753 Dynaflite with Ovoid tubing, SB4409. But what about SB664, an early Carlton Capella lugged Imperial tubed 753 frame, that is also a possibility.

It is a constant battle! And now another frame is fighting for top spot… SB1500, my newest arrival, this has so many possibilities that give it the right to be up there with all the others too.

The Mysterious Carlton Capella Lugged Early Ilkeston SBDU Imperial Tube Reynolds 753 Frames

SB664 1976 TI-Raleigh SBDU Ilkeston Reynolds 753 Carlton Capella Head Lugs Blog Header

In the beginning there was Metric Reynolds 753 tubing, and then later in 1982, a new Imperial Reynolds 753 tube was introduced. The new tube, called 753R, had different diameters, different gauges and was slightly heavier than the original Metric tube. And that’s how it was always known… Metric 753 before 1982 and Imperial 753 available after 1982. That seems quite straightforward doesn’t it?

The SBDU and Their Use of Reynolds 753 Reynolds 753R and Reynolds 753T

There has always been lots said on the subject of Reynolds 753, and that doesn’t surprise me. This tubing had such an impact on the sport of cycling; the frames and their riders were breaking records before anyone even knew 753 existed! 753 frames are still sought after 40+ years following their introduction. You can’t go a day without the subject of 753 cropping up on the internet and the online debates and discussions mean that there are always stories and different opinions. But are these stories real and are the opinions accurate? What is truth and what is myth? What are these stories? Have I done enough research and accumulated enough data to either prove or debunk them?

SBDU Ilkeston Special 753 Dynaflite SB4409 1981 (Reynolds 753 Fillet Brazed with Ovoid Tubing)

SBDU Ilkeston 753 Dynaflite 1981 SB4409 753 Aero Tubing

Wow, there are some rare frames, and then there is this one. The overwhelming reaction from most people is “Never seen one of those before…”

Reynolds Tubing Wall Thickness Tube Gauge and Seat Pin Size

SBDU Ilkeston TI-Raleigh SB5794 1982 Reynolds Specifications

This post isn’t necessarily about the SBDU, but I thought I’d write it as I get asked regularly to confirm seat pin sizes, or to try and decipher what an SBDU frame might be made from based on the seat pin and tube size. After collecting several SB frames over the years, I’ve seen lots of different seat pin sizes used in Reynolds frames. I have seat pins ranging from 26.6 to 27.4 – and 753 frames with 4 different size pins. That demonstrates just how varied their tube gauges were. So here is a little post that lists some of the most common seat pin sizes and the associated Reynolds tube gauge (wall thickness).

SBDU Ilkeston Metric Reynolds 753 Seat Pin Size – The Truth

SBDU Ilkeston TI-Raleigh 1980 Metric Reynolds 753 Seatpin Size

There are many stories about the SBDU and even more about Reynolds 753 tubing. Most of these stories travel the internet, changing and evolving each time they are told. Something as simple as which seat pin size should fit a 753 frame is one of those stories. It causes the most confusion and creates some of the longest discussions whenever it is raised. Everyone seems to have an opinion about what is right; few ever seem to agree. My latest addition, SB3800, means that I may now have a couple of frames that could finally settle the seat pin debate.