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Headshot

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  1. 35 minutes ago, dave303e said:

    So on most of the motorbikes you always have a heat insulator between the pad and the brake caliper/piston. I have boiled far to many rear brakes on offroad motorbikes. It is one of the worst thing to happen when you really need your breaks and they just fade or the pedal/lever loses all pressure. MTB calipers never have that insulator so I am always weary. My concern with it is if you need to bleed brakes in a hurry and can't find Shimano or another good mineral oil and all of a sudden without knowing it you are putting in an oil that boils at 2/3rds of the manufacturers oils boiling point and then expecting it to perform. Motorex is one of the higher boiling point mineral oils, it boils 120dec C hotter than the Magura mineral oil. 

    You put in any DOT5,1 and you know the minimum boiling point is exactly the same through any brand you can get your hands on in a rush. Also you can walk into midas/autozone/mica/chamberlains and get brake fluid. As soon as you need mineral oil for brakes you are going to get torn a fresh one by a bicycle or motorbike specialty brand and supplier. Shimano mineral oil is nearly R140/liter more expensive than a good motul dot 5,1 fluid.

    I think you're overthinking it on the MTB side. I use some french hydraulic mineral oil in my Shimano's with no noticeable side effects - just good braking and no fade.  I do abuse my back brake a bit. You can click on takealot and order some of the automotive quality mineral oil at under R200 p/l and it will be with you in 3 days. 

     

    Sorry its now R202.00 https://www.takealot.com/total-lhm-plus-hydraulic-mineral-liquid-1l/PLID72926639?gad_source=1&gclid=Cj0KCQiAoeGuBhCBARIsAGfKY7zwsNx_Klka_opoQabXyCtkgqNzBF1zwPXdxCZc4jHLmt5o9ap9mswaAonhEALw_wcB&gclsrc=aw.ds

  2. 1 minute ago, BaGearA said:

    Boling water can hurt so stay away from that one.

     

    Mineral oil , bad for the system and oil. Flush asap but you still have some decent working service out of the brakes. 

     

    Dot , very bad. Because it absorbs water and if it has already then the steam will rise to the top ( your lever ) because it has a boiling point so much lower than the dot and suddenly there will be jack out of your lever , as in nothing. 

     

    The above scenarios are super hard to create , even if your brake oil is more than 10 years old. SO don't stress about it too much , regular maintenance on a modern system will give heaps of reliability and decent performance be it dot or mineral based.  

    Agreed, but only if the levers are properly made and my Guides were awful with sticky levers because of poor quality pistons (yes I know they've fixed the problem since) but the other k@k thing was how the fluid started stripping the finish off the paint on the levers despite being very careful about washing them off. Poor quality like this put me off SRAM brakes for good.

  3. 31 minutes ago, Shebeen said:

    how hot do they actually get, do you have this data? All i know it's hot enough for some of them to put fins on them for cooling (or is that just to look cool?)

    rotors? yes. well

     

     

    I prefer real world testing like when i crashed and the hot rotor lay against my leg and left a lekker Shimano burn mark. 

  4. 3 hours ago, Mamil said:

    Having only started riding when all bikes were 29ers I just think 26 looks funny. I look like a gorilla with skinny legs on my xl bike with 29ers anyway so can't imagine the pack trailseeker images I'd cringe at if I was on a 26

    I'm 188cm and ride a 26er steel HT regularly. The weight of the thing doesn't make it something you'd  ride an XCM event on but it could be done and it really shines on the descents. I'd happily do an easier  stage race on it.  It feels exceptionally nippy and corners beautifully That said, the right tyres and spare rims are harder to find...

  5. 1 minute ago, Hairy said:

    all those graphs and charts are about as exciting as a gravel mtb ride / race with the DSTV (Supersport) commentators 

    next thing you are going to say this 150mm travel bike also needs to be fitted with semi slick race tyres at max. 2.1" widths and pressures that would impress a roadie from the 90's on a narrow roadie tyred bike....(though research does however note a larger volume tyre is more efficient off road.) 

    And Shaun would get whipped every day by this thing if it rolled full 26 because it has the power of "E". 

  6. 2 hours ago, BaGearA said:

    Haven't nearly all the pro's that tried 27.5 rear's revert back since like 2 years ago already ? Even the shorties like hart is on full 29er afaik.

     

    Debate what you want gwin would looi me on a 26er from 2001 even if i was on an ebike

    But there's thatguy racing Red Bull Hardline tasmania on a new Spesh Demo with 26 front and 24 rear wheels...

  7. GPS data wont assist you with position of the bike due to inaccuracy and even if it shows he was speeding doesn't imply fault. 

    If the eyewitness reports are accurate then it seems the moto guy was in the wrong lane over a solid line. 

    As others have said, CP is a stupid road to ride fast on a motorbike. As a somewhat reformed sports car driver, I can confirm that twisty roads with dual lanes are the most fun to drive and ride. Rhodes Drive, CP and no doubt FP are not such roads and were never much fun to drive because of the traffic.

    Trying to have a fun speedy ride or drive  around CP when its full on cycling season is just plain stupid.

     

     

  8. I've seen cyclists over cooking corners on that descent and enting up on the opposite side of the road - luckily no oncoming cars at the time. Sometimes wide bakkies  hurtle up that side and overtake cyclists heading up, leaving very little space for riders descending. As others have said, one of your responsibilities when driving a 2 ton vehicle is to avoid causing injury and death to others. 

    I'm glad we weren't on Chappies this weekend. The road from Simonstown to Scarbs is wonderfully traffic free on a Saturday morning. What a pleasure. Just one chop of a bakkie driver who passed me twice well under 1.5 on an empty open road. 

  9. 19 hours ago, Shebeen said:

    Not a lawyer but think they have already (all, as tried together) lost.

    Taxes and loopholes, a dance as old as time itself. I'm not in the game but thought it was common practice for bikes to arrive in parts here and then get assembled, to avoid this exact duty.

    obviously the 15% is on landed cost, not RRP 

    A good few years back I was involved on behalf of an importer of plastic sheeting liner material which SARS decided was not exactly what it said on the box (biaxially oriented) and a higher duty was due. After a win in the High Court and being thrown out on appeal, SARS gave up. Back then judges were perhaps a bit better than now, but it does all turn on semantics and in some cases like this one, a bit of science, so a good expert is essential. When it comes to bikes, I suspect most Judges think they know what one is but its hard to see how a wheelless frame is a bike, unless it was also seen as a contrived attempt to escape duty, which it probably was.

  10. 2 hours ago, ChrisH said:

    The point of my original Facebook post appears to have been lost on a lot of people.

    In summary then...

    We know that some drivers drive their cars like idiots. We can't change their behaviour no matter how often and how loudly we point a finger at them. We just can't.

    The reality is that cyclists have it in their power to minimise the risk presented by rogue car drivers by actively riding in a defensive and sensible manner. Riding 5 or 6 abreast on a road that is known to be a killing field for cyclists is not, by any stretch of the whataboutist's imagination, doing the sensible thing. All you are doing is making the target 5 or 6 times bigger.

    If we want to reduce cycling fatalities, we have to pack our cycling egos away and look within the cycling community to do it ourselves. In South Africa it's not going to happen by enforcing laws, we are too far down the road of lawlessness to achieve that.

    Actually I think you're dead wrong on one thing. The bigger the group of cyclists the more likely the car has to take note and slow down to pass. Most fatalities and incidents, like Savages recent one and the poor bloke who was struck by the drunken Navy guy near where your pics are taken were not in large groups or riding abreast.  In fact i think very few incidents between cars and cyclists involve large bunches but I'm happy to be corrected. 

  11. I am embarrassed to be even a temporary road cyclist . If the outfits aren't bad enough you get to be lumped with a bunch of riders who get into a group and start behaving as if they own the road. Sunday a group from CY  - about 40 riders with a support bakkie following them took over Chappies for a while. They weren't the only ones. I cringe in my lycra when I see that. That said, the vehicles on the road were well behaved and just sat there until they could pass. 

  12. Can I add pedestrians and runners to the list of moving danger areas?

    We had three incidents on one ride this weekend. Runner going away from us on the sidewalk drops into the road just ahead of me to overtake with no concern for what's coming up behind. Then a woman on her phone crossing a busy road near Glencairn with no attempt to keep an eye on approaching bikes (or cars). The third was similar to number 2 - guy on foot crossing road in front of my wife in Tokai. 

    In comparison the cars were well behaved, but sadly some fairly idiotic riding too. Don't overtake slower riders in the face of a following car when the road widens ahead in 150m presenting a far safer place to pass... Eish.

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