I've been watching some videos on YouTube and overheard a guy talking on his phone at Mt Lofty, it turns out that people are hitting max speeds of over 80kmph down Greenhill Rd.
I am 6ft 5 so I'm not the most aerodynamic but I don't even get to 70.
Does anyone get to speeds this high? If so how/where do you do it???
And a strong tailwind helps...
Descending is an art form, there are those that are good at it and those that aren't.
I used to ride and race with a couple of guys in Brisbane that were 6' plus and weighed around 90kg, when we got to the bottom of the hills, they disappeared out the back rapidly and it wasn't hard for me to put 5 or 6 minutes into them on a 10km climb, however they could recover a lot of that in the descent.
I followed them down Mt Tamborine one day, after waiting at the top for them, and I found out how they did it. Their speed and commitment in the corners was unbelievable (for me anyway). In one hairpin, they went around with the back wheel chattering as it skipped across the ground, something I was never prepared to try. After this I never saw them again until we reached the bottom.
Go down as fast as you like but PLEASE don't do it by riding down the white centre line. I drive up and down Greenhill at least twice a day and I can't tell you the number of times I have nearly taken out a fast decending cyclist who is riding on the white line. Visibility around corners in the car is quite restricted and there is literally no where for either of us to go. Also if you are on the white line when a bus suddenly appears coming up the hill they simply can't stay within the lane (near misses between the bus and car feel like they happen most times you pass one) so I think you would be in severe danger on the white line. If you only feel safe being right in the middle of the road chances are you are going faster than is actually safe for you.
I was discussing descending the other day with a motorcyclist friend. We both agreed how stupid it was to do a tight right hand bend with one's head hanging over the centreline. We have both done it at various times, he on the motorbike, I on the pushbike. The only difference is that he can do it going uphill as well. (Greenhill Rd and Belair Rd both in the conversation.)
well inflated tire have less rolling resistance and so will help you go faster.
keen people check their tire before every ride (so I am told)
greenhill rd can be fast but i would suggest if you have any worries abiout fast decents then try another rd,i have reached 90km/hr down the main willunga hill but that is straight and with good vision and i did it when there were no cars coming up or going down,was never going to get to 100 even though i think its possible on this decent,i wasnt brave enought,baled out at 90.stacking it at that speed would not be good,its a buzz but not for everyone.
Don't forget the universal law of descending. "Confidence and speed increases incrementally and gradually until the inflection point where it declines rapidly"