-
also maybe take a look at member numbers as well and then make your comment.
PS - no need to tell me to fuck off because we all already know you're going to do it
To be fair, he has been around that long under the name mitre_tester, until he join a new club and end up having a new username.
-
also maybe take a look at member numbers as well and then make your comment.
PS - no need to tell me to fuck off because we all already know you're going to do it
23/11/2009, isn't that when mitre-tester became mdcc_tester?
I think too many people take mr tester far more seriously than he does himself. Any one who could star in /that/ picture can do no wrong by me.
-
Yes-ish,it's a new old stock '92 frameset that i built up with campag 50th stuff that was mainly nos or mint used.Rides nice but only when it's not raining which is about two weeks of the year up here!
Tis beautiful with the chrome lug work - I've got a 60s Magnum Bonum that my dad bought back end of the 70s. Spent about 20 years corroding in the garage, then I rescued it from disrepair with a lucky find of parts from a friend. Could do with a respray but I love the colour, and it gets ridden all conditions!
-
I think too many people take mr tester far more seriously than he does himself.
Nice to know at least one person gets it.
-
23/11/2009, isn't that when mitre-tester became mdcc_tester?
I think too many people take mr tester far more seriously than he does himself. Any one who could star in /that/ picture can do no wrong by me.
- 1
- 1
-
Yummy, and I do love the typography;
http://farm5.static.flickr.com/4007/4664553237_22fb762a88_b.jpg
Frickin' Gorgeous
-
http://www.chariandconyc.com/images/products/detail/DSC_0943.4.jpg
Mondrian saddle from Blue Lug, want to see this on an old yellow Look track...
-
Mondrian saddle from Blue Lug, want to see this on an old yellow Look track...
Or on this
1 Attachment
-
-
I'd prefer it on a yellow one, bit of a Mondrian overload otherwise...
-
I love the amount of thought and engineering that has gone into these. They are highly engineered to be light, stiff and powerfull, and it is interesting to see how that has led to trade-offs in other areas.
Stiffness demands the shortest possible lever arms, so: dual pivots down close to the pads and shorter than normal slots for the pad holders, with the rest of the adjustment achieved by an eccentric fixing bolt. Stiffness also demanded the depth and diameter of the main pivots.
Lightness machines away the material that is contributing least to stiffness, leaving a chunky ridged un-aero structure.
Power comes from the progressive advantage linkage - as more cable is pulled the leverage increases (and pad-motion reduces). This matches well the force profile needed to move the arms in initially against just the spring then also against the compressing pads. I don't know of any other brakes that do this as radically. The dual-pivot and cam mechanisms of other brakes increase the mechanical advantage more uniformly across the range of motion - something that could be done less compactly by just making the cable-arms longer.
But the linkage is also at the root of several niggles: you have to make sure the linkage is ramping up the leverage at the right point in the pad motion. The barrel-adjuster isn't in the right place in the mechanism to set this, so the brakes come with a variety of spacers to put between pads and the lever arms to adapt to different rim widths. That isn't a complete solution - as the pads wear down you'd have to change the spacers to keep the leverage profile the same.
The linkage combines with the dual pivots to create another niggle. The structure of two arms with fixed lower pivots and two upper pivots that are pushed apart is potentially unstable - if the upper pivots are closer than the lower pivots it will tend to flop sideways, one arm moving in and the other out. Springing the arms against each-other rather than the un-moving central parts exacerbates this, but it's putting the cable anchor on the lower pivot that guarentees the linkage would flop if not constrained.
So it is constrained, by a mini link - the little rod that runs from one arm of the main linkage to just in front of the central bridge bolt. This forces the arms to move symmetrically - consistant pad motion they call it.
Consistent pad motion sounds good, and inconsistant motion can be a real problem that frustrates setting up brake pads clear of the rim, but once the pads reach the rim what you really want is symmetrical force. If the rim is a little off-centre from the brakes, the diminutive mini-link will be struggling to make one pad push harder, trying uselessly to centre it. On other brakes it would be the springs that fight to centre an off rim, but springs are happy to loose and bend; the mini-link isn't. The brakes can be set up centred over incorrectly dished wheels, but that takes time and doesn't address poorly trued wheels.
The snap-in pad holders are a real innovation - it would be good to see other manufacturers licence them.
I'm not digging into these because i don't like them, i do. I'm digging just because they fascinate me.
-
are you new here then?
edscoble
DR
s.walrus
TM
gbj_tester
vinylvillain
EEI
Gabe
scorch
deleted
Nahguavkire
moth
Sumo-
Post a reply
About
Bike porn
Posted by
@Velocio
It certainly has something but i dont think i'd crawl over hot coals to own it.