I’ve just realised that I have never detailed the build of this bike. I tried my best to recreate a build specification that was sent by Gerald O’Donovan to a customer in 1982.
Before continuing with the post below, I’ve updated SB4059 since this post was written as I’ve found more and more original and period correct NOS parts, changing saddle, freewheel, chain, tubs, toe clips and straps. This post is a comprehensive list of the spec as it was and has lots of information. Please see the following posts for more a more up to date specification.
**End of Updates**
As my bike was built in 1980, there are a couple of items that don’t exactly match. There are also a couple of small differences due to the age and growing rarity of components. So, here goes, starting with frame and forks – this might get a little bit detailed and will be a very long post so please bear with me!
Frame & Forks
- Tubing: Reynolds 753 Metric 801
- Frame Number: SB4059
- Year: 1980
- Size: 57 cm
- Weight: Frame 1645 gr Fork 639 gr
Reynolds 753 was introduced around 1975. It was a metric diameter tubing with measurements of 28.0 mm O.D. for the seat and down tubes, 26.0 mm O.D. for the top tube. Seat posts for these 753 frames are either 27.0 for small frames or 26.8 mm for large frames. This depended on the code of tubing used. 801 was slightly lighter, and 803 was used on larger frames. My seat pin size is 27.0 mm because of the 801 tubing.
753R and 753T are Imperial. Tubing diameters are 28.6 mm O.D. for the seat and down tubes, 25.4 mm O.D. for the top tube. This 753 tubing was introduced around 1983. Seat posts for 753R and 753T are either 27.2 or 27.4 mm.
Unfortunately, the frame and forks no longer have the original Ilkeston paint. It has been renovated at some point in its lifetime, like so many others. If you are not careful at the point of renovation, and don’t know the finer details of these frames then tiny discrepancies can occur. My frame does have the correct black head tube. Early SBDU frames from 1974 may have the yellow head tube, but this was changed very early in the SBDU history – it was thought that the Raleigh head badge would be seen better on a black tube rather than yellow. Although my frame looks ok, it has 3 decal issues.
- The top tube has “Team Raleigh” – this looks correct but SBDU stopped doing this in approx 1975. From 1975, these frames would simply have a “Team” decal.
- The 753 decal is incorrect. It has a decal from post 1983 when 753 changed from metric to imperial.
It should have…
- Finally, it has missing Ilkeston oval decals on the chain stays.
My frame number is SB4059. This is generally stamped under the bottom bracket shell along one edge with the frame size stamped on the opposite edge. Typically, it is in the format “SBxxxx”, but I have seen others that differ slightly, sometimes with the number before the SB and sometimes the frame size and frame number on the same edge. Serial numbers without the SB prefix can also be found stamped into the fork steerer column. The build year of my frame is 1980. There are no detailed records or logs for frames produced by the SBDU. All dating evidence is done by comparing your number against others. Several owners have paperwork, build sheets or receipts that tie in with their frame, giving an accurate build date. This can be used as an excellent indicator to date a frame, together with knowledge of the amount of frames produced each year by the unit.
Most SB frames were built to a standard specification with regard to tube lengths, angles, braze-ons. Any frame with both an SB number and a reference beginning with “H” would indicate something built to a customer specification. Frames ridden by the professional TI Raleigh team would be different again. A professional team rider frame would not have an SB number or an H reference. It would simply have the rider initials followed by the frame sequence followed by the 2 digit year. For example, a team frame stamped HL.1.83 would be for Henk Lubberding, his first frame for 1983.
Frame size is 57cm. This is stamped on the under side of the bottom bracket. It is measured from the centre of the bottom bracket to the top of the seat lug. The following dimension sheet was supplied by Mike Mullett, Workshop Manager at Ilkeston SBDU from the late 70’s to the early 80’s:
- Headset: Campagnolo Super Record Road
- Model Part Number: 4041
- Bearings Part Number: 2101 (20 x 20 3/16″)
- Weight: Approx 140 gr
- Stack Height: 42.2 mm
- Threading: English 1″ x 24 tpi
- Crown Race Diameter: 26.4 mm
- Pressed Race Outside Diameter: 30.2 mm
- Bottom Bracket: Campagnolo Nuovo Record (Steel Axle*)
- Model Part Number: 1046/a (Strada)
- Bearings Part Number: 2100 (11 x 11 1/4″)
- Weight: Approx 277 gr
- Shell Width: British 68 mm
- Axle Markings: 68-SS (road)
- Threading: British 1.370″ x 24 tpi
- Adjustable Cup: RH Threaded
- Fixed Cup: LH Threaded
*NOTE: Although the Super Record groupset had a Titanium bottom bracket (Part Number 4031 1st Gen Hollow, 2nd Gen Solid), the Steel Nuovo Record BB was specified on the Team bikes.
- Seatpin: Campagnolo Nuovo Super Record
- Model Part Number: 4051/1
- Weight: Approx 215 gr
- Diameter: 27.0 mm
- Length: 180 mm
NOTE: Seat Pin Fastening. Seat pins on these frames are normally secured with an 8 mm bolt. The thread on my seat lug has been removed and I use a Campagnolo Seat Pin Binder Bolt. Model 1070/1072 (weight: 10 gr)
- Rear Derailleur: Campagnolo Super Record
- Model Part Number: 4001 Second Generation Version 1
- Weight: 185 gr
- Year: PAT80
- Maximum Freewheel Size (Teeth): 28 – the largest freewheel sprocket a derailleur will handle
- Maximum Total Capacity (Teeth): 28 – the difference between the smallest and largest sprockets plus the difference between the smallest and largest chain wheel sprockets
- Front Derailleur: Campagnolo Super Record
- Model Part Number: 1052/SR
- Weight: 92 gr
- Type: Band On (Alternative Braze On Weight 88 gr)
- Chainset: Campagnolo Super Record Road
- Model Part Number: 1049/A
- BCD: 144 mm
- Extractor Thread: 22 mm x 1 mm
- Crank Length: 170 mm (165 – 180 mm in 2.5 mm increments)
- Pedal Thread: 9/16″ x 20 tpi (English)
- Chain Pitch: 1/2″ x 3/32″
- Date Code: Zero within a Circle denoting 1980
- Pedals: Campagnolo Superleggeri (SL) Pedals (Steel Axle*)
- Model Part Number: 1037/A
- Weight: 314 gr
- Pedal Thread: 9/16″ x 20 tpi (English)
- Toe Clips: Campagnolo Superleggeri (Model 0990/06)
- Toe Straps: Alfredo Binda Extra (Leather/Nylon Laminated)
*NOTE: Although the Super Record groupset had Titanium axle pedals (Part Number 4021), the steel axle SL pedals were specified on team bikes. The SBDU also specified Sturmey Archer Toe Clips and Straps.
- Brakes: Campagnolo Super Record (Version 1)
- Model Part Number: 4061/1
- Weight: Calipers 381 gr (pair). Levers 222 gr (pair)
- Reach: Piccolo – short reach 47mm
- Hubs: Campagnolo Record Small Flange*
- Model Part Number: 1034
- Weight: 527 gr (pair), including QRs
- Spoke Drilling: 36 hole**
- Bearing Size Rear: 1/4″ 9 x 9
- Bearing Size Front: 7/32″ 9 x 9
- Front OLN: 100 mm (Over Lock Nut Measurement)
- Rear OLN: 126.5 mm (Over Lock Nut Measurement 6/7 speed)
- Rear Hub Freewheel Thread: 1.370″ x 24 tpi (English)
*NOTE: Super Record hubs with part number 4014 were introduced by Campagnolo but removed shortly after as the Titanium axle would snap.
**NOTE: SBDU specified either 32/32 or 28/28 spoke drilling. However, the rarity of available rims meant that I had to use 36/36 for this build.
- Rims: Mavic SSC Special Service des Courses
- Weight: 409 gr per rim
- Spoke Drilling: 36 hole
- Rim Width: 21.5 mm
- Rim Type: Tubular
- Rim Size: 700c (622)
NOTE: SBDU specified Berg Union Chrome Spokes. I have built my wheels with DT Double Butted Stainless Steel spokes
- Cinelli 1A stem with Cinelli Campione Del Mondo 66-44 Handlebars.
- White Benotto Handlebar Tape
- Clement Criterium Seta Tubulars
- Black Iscaselle Tornado Saddle
- Original Grey Outer/Inner Campagnolo Brake Cables (Part Number 2027/2029 & 2026/2028)
- Original Steel Campagnolo Outer Gear Casing (Part Number 617)
- Original Campagnolo End Adjusters (Part Number 302/1)
- Regina Oro 6 speed freewheel and chain
Sources of Information
Sutherland’s Handbook for Bicycle Mechanics 4th Edition
SBDU Specification Letter dated July 1982