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Posts Tagged ‘1979 brooks b17 narrow saddle’

the beezer, pretty much completed

This has been a bit of an exercise in ‘period’ upgrading, without unnecessarily over-capitalising the bike. The way I mostly save on expenses is to do all the work myself, to avoid labour costs.  Not only that, but it’s more satisfying, especially when building up your own wheels.

Apart from consumables – chains, cables, tyres, bar tape, bearings, brake pads – I also try and use as many recycled components as I reasonably can.

the drive-line

The new bottom bracket cartridge turns in easily on the re-tapped threads, but it tightens up well. A Genetic brand 110.5 mm axle was about right for chain line.

I’ve chosen a set of Sugino Mighty cranks in the unusual 171mm length – the original (?) drillium inner ring was worn, but I salvaged a pair of rings in 144bcd from my Ofmega CX cranks as I can no longer use these without a good Ofmega or Avocet spindle. Apparently they ( Ofmega ) are incompatible with JIS or ISO tapered spindles..

144 b.c.d. is an old ‘bolt circle diameter’, and these rings can be hard to find in 3/16″ derailleur versions, though there are plenty still being made for 1/4″ track chains. Their down-side, in the modern world, is a minimum useable chainwheel size of around 42T.

1979 b17 narrow

The fork was refitted with new 5/32″ bearings in the original headset. For lightness and reliability I’m using a Shimano 500 rear derailleur, salvaged from a hard rubbish bike and a Shimano 600 front derailleur – with the Shimano band on down tube shifters from an old Bennett. The original 25.4mm seat pin was a bit short so I fitted a longer version of the same. The saddle is a 1979 Brooks B17 narrow.

The stem is a Soma Sutro 80mm with 25.4 bar clamp and a set of Charge classic drop bars.

Brake levers are 1st generation Dura-Ace, which look similar to my drilled 600 ‘Arabesque levers’ ( these, and those, are the nicest shaped non-aero levers I’ve used ).

The Weinmann centre pull brakes would have both been retained, with new pads fitted – except that the front one wasn’t long enough to reach the new 700C wheel and so had to be replaced with a period Dia-Compe.

The rear brake had longer reach so was re-used. These centre pull brakes have a slightly spongey feel to them compared with modern dual pivot brakes – steady does it.

weinmann/alesa concave 700c – they are tough !

The original Sturmey Archer hubs have been re-laced into Weinmann / Alesa concave 700C rims to allow a decent choice of tyres, and the freewheel is a Shimano Z-series 14-24T,  5-speed cluster. The bike’s reduced weight will hopefully compensate for the 52/42T chain set and should work pretty well for me, although it is a bit higher than the original 49/40T. I couldn’t get a 28T freewheel to clear the derailleur for some reason.

The tyres are Tufo ‘tubular clinchers’ in 700 x 25C – a tight fit on these rims. I’ve grown fond of Tufos, they are well made, light, and they also ride, corner and grip quite well. Removable presta valves allow the use of sealant if punctured.

Now it’s a matter of refitting the original stainless steel mudguards, fitting the chain, cables and bar tape, and a lot of adjusting and tweaking … woohoo — I can’t wait to take it for a spin !

 

P.S.  Here’s a list of the original parts – if any one happens to be restoring one back to original ( most are not in these photos ) :

Bars : Steel drops 25.4mm unbranded

Stem : Steel quill 1″- no branding.

Headset : 1″ loose ball 5/32″ 26t.p.i threading.

Chainset : Raleigh 49x40T cottered, steel. 26t.p.i. bottom bracket threading.

Freewheel : Atom 77,  14-25T 5-speed cluster

Derailleurs : Raleigh branded – made by Huret  rear with 26 & 28T options.

Brakes : Centrepull alloy —- Front : Raleigh/Weinmann 610 — Rear : Raleigh/Weinmann 750, Weinmann alloy levers with Dia-Compe ‘safeties’

Rims : Rigida Chrolux 27x 1 & 1/4″ HP steel 36H 3-cross spoking

Hubs : Sturmey Archer high flange steel 36H

Shifters : Raleigh, down-tube, band-on ( Huret again )

Stainless steel mud guards fitted – as in these photos.

Pedals : Raleigh 717, rat-trap steel as in these photos

Saddle and bar tape ( ? ) – non-original…steel seat pin 25.4mm.

 

 

Until next time – happy re-cycling !

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