Probably, I’d assume, due to the clamping forces of the bolts holding the plates against the bearing collars meaning the whole thing is kept dead square; the two linkage plates are perfectly parallel and the collars/bearings/bolts are perpendicular to them. The whole thing is dead-square. The resultant forces in the linkage plates will be exactly and directly opposed to each other, whether under compression or tension. The plates would only bend outwards (or inwards) should the arrangement become out of square and the forces become off set to one another. For example a worn needle roller bearing, worn collar or a loose bolt could potentially cause outward or inward bending. The main thing though, is that even if they were made of material too thin/weak to start with (which the Projection Components items most certainly aren’t) they would more likely fracture, crack, tear or split under the tension that the system is under 99% of the time, long before they ever had the chance to bend under compression.

Banana is a good example and yes, because of the bend, your links have ended up longer and a similar length to OE. The shorter the linkage plates between hole centres the higher the bike by a ratio of 1:3 so 5mm closer hole centres will give approximately a 15mm rise at the rear.

Theoretically the effective load is between the centre holes, but it isn’t in reality with the projection links because the holes have no material between them to transmit that force where it would want to go (between the holes centres/dashed line on your drawing/yellow line on mine below). In a normal stock linkage plate this would be the case. The actual force in the Projection Components linkage plate is transmitted along the top edge of the (as orientated in your drawing) – following the red line. This creates a moment arm (blue line): the product of the a force and the distance from a its reference point (hole centre in this case). This moment arm creates torque, and that torque, because the forces are acting in opposing directions, acts in different, opposing directions at each end of the arm, resulting in the bending (or stretching if you like) observed. This torque reaction will apply equally whether the opposing forces are pulling or pushing against each other (topping/bottoming-out); it just means it would bend the other way.



In layman’s terms, here’s an example that might help: If you get a four hefty chaps at each end of a traditional style hospital bed like this sort of thing…



…and they grab the head and tail ends in line with the mattress base frame and pull, or push, the bed will not bend in the middle. If those hefty chaps now hold the bed at the top of the head rails and tail rails and pull, or push, with exactly the same force, the bed will bend in the middle (upwards if pulling, downwards if pushing) because of the moment arm introduced (additional distance from the force’s reference point which is level with the base, the link, or couple between the two bed ends) and its resultant torque.

In a nutshell Jon, all of the above was the result of your shagged OE Sachs shock allowing the suspension to crash into the bump-stop on compression and extension without any control/damping at all. Personally I think the PC links are more than man enough for the job if everything else is in GWO; they just become the weakest link in the chain if something else in that chain craps itself!

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And crap itself is exactly what it did, all over my rear tire, luckily for me this was half way across rudland rigg, a looong, fast (50-60mph) green lane. Light gravel and plenty of jumps to empty all the oil from the shock and scrub the oil from the rear tire.

Riding the steps at the far end was fun with no damping haha. Still i did a better job than my friend Pete



Anyhoo here are the new beasty links.



Compared too the old ones.

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To boldly go where no Tenere has gone before.

I was looking on their website to no avail for same..Have you by chance a reference/part number please?


The holes in mine are oval after 70,000kms of hard use and I need to upgrade.


Thanks

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The Suit:What would you consider to be your greatest weakness?
Me: Honesty.
The Suit: Honesty? I don't think honesty could be construed as a weakness.
Me: I don't give a f**k what you think.

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