Goodbadugly

"Where do spokes break? It depends on who built them. Spokes can also break in the thin shank, this happens only if you ride into a stick of something. This is a tension break. Other spokes break from fatigue - always at the elbow. Yet others, where the rim is not designed for large angles, break at the thread. This is a stress crack, the stress riser (starting point) being the first thread on the spoke, hidden inside the nipple." JB. I have read on mtbr that one guy complained that some of the Supercomps failed where the threads started. I have no experience with them. Maybe 2mm vs. 1.8mm a not so good idea? An idea to create more niche sales like JB said.Goodbadugly2009-10-04 11:58:17

I wouldn't say that they are worse that other rims in that weight group. Just remember to compare apples with apples. If you compare the heavier Mavic XM317 to the lighter 400 gram rim you will also find the 717 "weak". A friend of mine totaled a 717. And he is not an aggressive rider. If the manufacturer reduces rim weight, they either have to make the material thinner or omit the eyelets. Some manufacturers claim wonderful stiffness and strength for their products using certain alloys. Decide if you believe in their claims.

Dt Swiss gives the max rider weight of the 4,2d as 90 kg. Add a bit of kit, bottles, a rough rider (I am not saying you are rough) and a rough XC track and you may need a new rim. This is always a difficult point. You get a 120 kg rider just cruising along and then you get a 67kg guy giving it horns. So what is the max rider weight?. The 4.2d is the lightest XC alu rim produced by DT swiss at 400 grams (inner bead 19mm). The 4.1 weighs 425 gram (inner bead 17 mm) I have found the 4.1 tougher. I have also replaced a 4.2d rim. I ride 2.0 bar and 1.8 bar. 2.1 tubeless tire. Weigh 76kg. And yes, get a good wheelbuilder.Goodbadugly2009-09-22 14:12:34

I have never thought of a torque spec for cl rotors. Just use a short shifting like JPW#, dirt-rider and me. See the torque spec on the cassette. Should be in the same region.

That is why I learned to service my own stuff. Then I can only blame myself for bad service.

WD40 for tar.

Seems as if we have the same model tool. Combine this with a small foldable pair of pliers and Bob's your uncle. Goodbadugly2009-09-10 13:46:50

A bit more sedate

Mama mia! I hope this monster comes with a map to show you where to find what on this tool. Where on this device do they store the rag to clean your hands after the bike transplant?

For extreme weight weenies only. Don't expect it to last. http://kcnc-usa.com/content/view/26/43/ This one? Only 165 gram. Buy a 256 gram xt casette that will last you a lifetime. Or a 225 gram xtr casette. Don't you find it strange that neither Sram nor Shimano has an aluminum casette in their collection? I am rather sure that they know a thing or two about drivetrains.

Huh?

Better components=less hassles. Take a nasty cheap headset for example. If you tighten it to much, it gets sticky. Less tight=a loose fork/steerer. A loose steerer=less confidence. More precise shifting will get you the right gear when you need it on a mtb. Shifting hassles will have you pushing your bike up that short steep incline where you could have made it if you got the right gear. A 15kg hardtail is a tad heavy.

Sun Eq 21 I have not tried these 350 gram rims, but have also played on the CRC website. A Hope pro II hub/Revo/EQ21 combo should weigh 1.474 kg and CRC will build them for R3088. Very attractive indeed. What does bother me about them is that they seem rather skinny with an inner bead width of 16mm. The lightest DT Swiss aluminum rim (4.2d) weighs 400 grams with an outer of 23.8 mm and inner of 19mm. The Mavic 717 also weighs 400 grams. Think twice if you intend using wide tires and if you expect your EQ21's to last a lifetime. (Speculation) The Weight weenies seem to like them though. http://forums.mtbr.com/showthread.php?t=370077

I have a Polar and a Garmin. The discrepancy is huge! It has been debated on many internet sites. The Garmin is very optimistic. Treat the Garmin as a GPS. Not as a "calorie counter".

Moenie met iets lol wat werk nie.

Same old same. Merc vs BMW. Toyota vs VW. Sharks vs Bulls. It boils down to what you want.

Why do you call a lightweight bike like that a "beast"? I would rather call it a dainty bee. A beast is more toward AM. Rock shox Revelation stuff. Nevegal tires. SLX gruppo. 180mm rotors. XT M770 wheels. For a lightweight bee(If money was no object) I would go for XTR crank and FD, XO the rest. Hope mini's, SID WC, DT swiss XRC 1250 carbons. KCNC stuff and a Gobi. Race King Supersonics.

When my 240s hubs did that (usually rear wheel first), I replaced the sealed bearings and the problem was solved. These should be replaced with quality bearings. I learned the hard way. Chinese stuff will see you replacing them again within 2000km's.

Personal preference. I prefer triggers. They haven't let me down. X9 or XO. The biggest difference between these two is the price. The gripshifts are lighter. The triggers weigh 225 grams a set. Anybody who weighed their gripshifters?

The pressure you measure is the difference between the inside and outside pressure. At sea level the atmospheric pressure is about 1 Bar (101.3 kPa). One bar is 100kPa to be exact. In Gauteng the atmospheric pressure is around 0.7 Bar. So if you pump your tire 2 Bar at sea level, it will be around 2.3 Bar in Johannesburg. The amount of air molecules inside the tire stays the same. The pressure from outside is less. So the measured pressure goes up. The shock pressure is MUCH higher. The pressure will go up by less than a bar. Nobody will notice that.

Yup, it was the older R-sys wheel spokes. They were recalled. I would rather stay with stainless steel, thank you. http://www.velonews.com/article/93054

I saw a series of photo's on a website where the spokes on his front wheel snapped in a corner and the guy fell himself into hospital. I will stay with metal, thank you.

Frail. You are one serious bike breaker!

Anything can be broken. Alu, carbon and titanium. If you pull it through your kloof. But I did not pull my carbon bike through my backside and it broke. I am back on aluminum. Handle carbon with care.

I have done the circle and I am back on an aluminum hardtail. I get more bump absorption from a 2.2 tire and a good fork than from a carbon frame.