sometime Posted September 25, 2012 Posted September 25, 2012 (edited) Wheels done... Years of V-brake use on those rims has no doubt given them a concave surface, creating aerodynamic lift in the lateral plane. You therefore need to watch out for the rims turning faster than the tyres resulting in tyre burnout and plumes of white smoke. Edited September 25, 2012 by sometime davetapson and Percyzn 2
davetapson Posted September 25, 2012 Author Posted September 25, 2012 Unfortunately, my SS sprocket spacer kit does not fit on the 8-speed freewheel. Probably something to do with 'don't mess with this design, else you gonna get hurt...' - so have had to keep the rear cassette. Have selected 20t rear sprocket. The front crankset features rivited chain rings, probably due to the fact that the modern removable chain ring would not be able to absorb the stresses generated by the Nishiki, and likely fracture under load. So have chosen to keep all three chain rings and use the middle one. The chief mechanic says that this is probably a wise move as the harmonics generated by the sheer cadence possible on the Nishiki Performace Model TM are deadened by the three chain ring set up. Reducing this to one chain ring could lead to shattering of the chain ring, plus all other chain rings within a 10m radius. Percyzn and Agteros 2
davetapson Posted September 25, 2012 Author Posted September 25, 2012 Years of V-brake use on those rims has no doubt given them a concave surface, creating aerodynamic lift in the lateral plane. You therefore need to watch out for the rims turning faster than the tyres resulting in tyre burnout and plumes of white smoke. This is very true. Luckily enough, the designated driver has a bladder of such capacity that should such and occurrence occur, natural evacuation of the bladder due to surprise and fear would cool the rims to the extent that the tyres would once again stick. The organisers of the event have kindly provided bladder refill zones disguised as 'beer short cut points' in order to maintain adequate bladder capacity. Agteros 1
Raab Posted September 25, 2012 Posted September 25, 2012 One of the best threads in a long time! +1!!
davetapson Posted September 25, 2012 Author Posted September 25, 2012 Finished product, Mark 1. Percyzn, divernick and Agteros 3
sometime Posted September 25, 2012 Posted September 25, 2012 This is very true. Luckily enough, the designated driver has a bladder of such capacity that should such and occurrence occur, natural evacuation of the bladder due to surprise and fear would cool the rims to the extent that the tyres would once again stick. The organisers of the event have kindly provided bladder refill zones disguised as 'beer short cut points' in order to maintain adequate bladder capacity. Good idea - I'd be a little worried out the thermodynamic stresses created when the bladder's contents, hit the red hot braking surfaces and the resultant chemical reactions, with the distinct possibility of a toxic vapour cloud being created behind you. But the Performance Design should ensure that you are so far ahead of the bunch that this shouldn't be a problem. davetapson 1
davetapson Posted September 25, 2012 Author Posted September 25, 2012 As happens with all high performance prototypes, some changes had to be made: 1. Unbeknownst to me, Nishiki seem to have pioneered the concept of the 'asymmetrical chain stay'. The Nevegal thus rubbed on the one chainstay so had to be changed for a Monorail (the next best SS Nishiki rear tyre) and luckily enough, I had one lying around in the garage. 2. The organisers became concerned about the sheer performance potential of the Nishiki Performance Design TM, claiming that Burry was threatening to pull out due to the damage that could be caused to the Sxxxxxxxxxd brand. The decision was then made to handicap the NPDTM by replacing the Nishiki 'feels like you're being fisted by a stallion kick' saddle with a Specialised saddle. Luckily enough, I found one on my boet's bike which is living in my garage while he is in NZ. Thus I did not need to purchase a new one. Such is life when you are in the SS flow - the universe will provide. NPMTM Mark 2: Agteros, nathrix and Raab 3
davetapson Posted September 25, 2012 Author Posted September 25, 2012 The NPDTM comes with ABS - a necessity due to the speeds achievable on such a machine. Details to follow...
davetapson Posted September 25, 2012 Author Posted September 25, 2012 Good idea - I'd be a little worried out the thermodynamic stresses created when the bladder's contents, hit the red hot braking surfaces and the resultant chemical reactions, with the distinct possibility of a toxic vapour cloud being created behind you. But the Performance Design should ensure that you are so far ahead of the bunch that this shouldn't be a problem. This was mentioned by some, claiming that this was some form of 'smoke screen'. This is patently untrue. The true reason for the toxic vapour cloud is to keep those individuals unwise enough to try and wheelsuck the NPDTM on lesser machines from doing so. The over-compression of suspended forks due to the g forces generated during turns by the NPDTM can lead to instability and the risk of crashing. It is merely a safety feature, and a sound one at that. Agteros 1
davetapson Posted September 25, 2012 Author Posted September 25, 2012 Oh, and specs: 38t (I think) front, 20t rear.
RockCoach Posted September 25, 2012 Posted September 25, 2012 Another prvious Nishiki Allwrong owner here. Oh, and specs: 38t (I think) front, 20t rear. Not bad. I will be running a 36 x 20.
Kevin07 Posted September 25, 2012 Posted September 25, 2012 Finished product, Mark 1. Get that man a Bells!!!
davetapson Posted September 30, 2012 Author Posted September 30, 2012 Well, the Nishiki Performance Design proved a feisty little thing to ride, certainly agile, but f%$@ me, I'll never ride a rigid fork mtb again. Coming off the mountain I was sure my hands were bleeding they were so sore. But that said, was still fun - a bike is a bike and better than no bike. Back to dual susp plushness for me... SSWC track was awesome - one of the nicest tracks I've ridden... thanks to SSGrantUsher and crew... divernick 1
divernick Posted September 30, 2012 Posted September 30, 2012 (edited) Well, the Nishiki Performance Design proved a feisty little thing to ride, certainly agile, but f%$@ me, I'll never ride a rigid fork mtb again. Coming off the mountain I was sure my hands were bleeding they were so sore. But that said, was still fun - a bike is a bike and better than no bike. Back to dual susp plushness for me... http://1.1.1.2/bmi/cdn.bikehub.co.za/forum/public/style_emoticons/default/smile.png SSWC track was awesome - one of the nicest tracks I've ridden... thanks to SSGrantUsher and crew... Haha, I was on a bike with a sus fork for the first time in a year....I might just keep it that way! What an amazing track, hey? The event was worth every cent and more! Edited September 30, 2012 by divernick
RockCoach Posted October 1, 2012 Posted October 1, 2012 Well, the Nishiki Performance Design proved a feisty little thing to ride, certainly agile, but f%$@ me, I'll never ride a rigid fork mtb again. Coming off the mountain I was sure my hands were bleeding they were so sore. But that said, was still fun - a bike is a bike and better than no bike. Back to dual susp plushness for me... SSWC track was awesome - one of the nicest tracks I've ridden... thanks to SSGrantUsher and crew...Well, the Nishiki Performance Design proved a feisty little thing to ride, certainly agile, but f%$@ me, I'll never ride a rigid fork mtb again. Coming off the mountain I was sure my hands were bleeding they were so sore. But that said, was still fun - a bike is a bike and better than no bike. Back to dual susp plushness for me... SSWC track was awesome - one of the nicest tracks I've ridden... thanks to SSGrantUsher and crew... I am very glad I had 120mm of travel on the front of my SS. My recovering left wrist took a hammering and it is still quite stiff this morning. A lot of that comes from the pushing and pulling on the bars while climbing out of the saddle.
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