Hope Pro II 150x12 48pt - a little mod

[Udi]

Did this a while ago and been riding it for a couple months, thought I'd share.

Always liked the price / weight / strength ratio of the Pro II's but thought the stock 24pt engagement was particularly slow, even though it doesn't make a big difference to most riding. Decided since I've run them for years on two pawls anyway that it would be fun to bring the other two back in, except modified for offset 2+2 engagement and 48 in total.

[Racebike]

Neat modification!

How is the noise level now?

[juanbeegas]

Am I missing something? That's what my hub looks like(4 pawls) and it's 24pt...

[Nick]

Cool.
More info, please.

[Racebike]

juanbeegas: No matter what your girl says, size does matter.

[IH8Rice]

two shorter pawls to grab the teeth?

[92SE-R]

Does this make it weaker to put loads on 2 pawls? Also, was it a noticeable mod?

[Racebike]

The load is on 4 pawls unless Udi has a bad vernier caliper is my guess.

[Sandwich]

Looks like two longs pawls and two short ones. Neat mod. What was the reasoning for dropping two in the first place?

damn those parts are clean...

[Udi]

Sandwich - Yep, two shorter pawls. The reasoning behind dropping two in the first place was to make it a bit quieter and kill a bit of drag, but this is more fun. I played with the spring tension a little bit to reduce volume/drag while still pushing all pawls into their seats firmly, so it's not too bad even though it's louder than with just two.

92SE-R - I've run them (had three of the rear hubs) for nearly 6 years on two pawls, so while technically you would halve the load capacity, it seems to be well within the strength limits of the hub (at least for my 180lbs with gear and whatever force I can generate personally). I can notice the faster pickup, obviously the dead zone is now halved so it's a reasonable difference.

Racebike/juanbeegas - Two (shorter) pawls now engage offset to the regular two, so engagement points are doubled. The load is on two pawls at a time, similar to a 72pt hadley.

[HAB]

Genius. How'd you trim them down?

[92SE-R]

Ok so howd you cut them down and howd you know how much to cut?

[juanbeegas]

Genius. How'd you trim them down?

I'm with this guy! Thanks for the explanation, Udi! It makes total sense now.

[dh_newbie]

How to do the modification?

[Udi]

I used a sharp axe and a lot of faith.

I'll take some vernier measurements of the shortened pawls next time I have the hub open if that helps, but basically you have to get two things right: 1) the timing, i.e. the short pawl has to engage exactly between two clicks of the standard pawls and 2) the contact angle with the track, this changes slightly from stock as the short pawls engage at a greater angle of rotation. I just trimmed one on a bench grinder a little at a time, testing until it was perfect, and then made a second one identically shaped.