SPD pedal compendium

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rogerzilla
Posts: 1517
Joined: 9 Jun 2008, 8:06pm

Re: SPD pedal compendium

Postby rogerzilla » 25 Sep 2020, 8:53pm

The M737 weighs 258g (cleaned, full of grease).

That's not bad, I hear you say; carbon Dura-Ace PD-9100 pedals are 228g.

Except that M737 weight is for ONE PEDAL :lol:

rogerzilla
Posts: 1517
Joined: 9 Jun 2008, 8:06pm

Re: SPD pedal compendium

Postby rogerzilla » 24 Oct 2020, 8:58pm

I rebuilt a couple of pairs of M737s from near-scrap condition (A525s are good parts donors as they are cheap, unwanted and less likely to have been dunked).

I like them. Bigger platform, less "hot spot", while entry and exit feels much the same as a current SPD if you use SH51 cleats. There is a bit of float.

There is no lip seal to keep water and crud out, so a total grease fill is imperative. I used Castrol CL, which is no longer made, but any grade 2 marine grease would be good. You waste a fair bit as it must squeeze from between the lockbolt and the axle as you screw the "cartridge" into the body. These pedals should be serviced more regularly than later SPDs, servicing basically consisting of unscrewing the cartridge, putting more fresh grease deep in the pedal body and refitting the cartridge so this new grease is forced back through the bearings. This isn't at all necessary for current SPDs but is still often advised by old-school magazine writers.

The internals are familiar if you've overhauled any other non-Dura-Ace SPDs. The cone and cone locknut are always right-threaded.

The mid-point tension is high. I had to wind mine back so the red indicator dot was past halfway.

I replaced the old plastic lockbolts with SRP alloy ones, since the plastic was looking very grey and tired after 30 years.

Brucey
Posts: 41011
Joined: 4 Jan 2012, 6:25pm

Re: SPD pedal compendium

Postby Brucey » 24 Oct 2020, 9:56pm

rogerzilla wrote:…. This isn't at all necessary for current SPDs but is still often advised by old-school magazine writers....


especially when new the bearings are usually 'bedding in' and wear debris soon turns the grease mucky-looking. If you open up a pair of SPDs (with seals) and find the grease in the bearings still clean, you can assume that changing it is a waste of time. Otherwise (and there has yet to be a 'clean grease experience' for me, and I have serviced SPDs about a hundred times now) you are definitely doing some good with clean grease.

Note that locknuts don't often work loose but it is often enough that I would advise opening the pedal to check for this even if regreasing weren't usually necessary.

The internals are familiar if you've overhauled any other non-Dura-Ace SPDs. The cone and cone locknut are always right-threaded.


in older SPDs yes the cones and locknuts are RH threaded. In newer ones (and sometimes replacement parts for older models that were not this way originally) the RH pedal has LH threading on the cone and locknut. Obviously it is good to know which you are dealing with beforehand, but this isn't always possible.

cheers
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~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~

thelawnet
Posts: 2556
Joined: 27 Aug 2010, 12:56am

Re: SPD pedal compendium

Postby thelawnet » 25 Oct 2020, 9:00am

Interesting that they don't (so far as I know) seem to fake SPD's, while SPD-SLs are faked in very large numbers and second-hand SPD-SLs should be treated with great suspicion, and all new ones assumed to be fake unless purchased from a reputable retailer.

rogerzilla
Posts: 1517
Joined: 9 Jun 2008, 8:06pm

Re: SPD pedal compendium

Postby rogerzilla » 25 Oct 2020, 9:05pm

I've seen dubious clone SPD-SL cleats but not pedals. Are they different inside (e.g. bushes rather than proper bearings)? Do they try to clone the DA pedals with the three bearings and external adjustment?