tombeej Posted June 9, 2011 Posted June 9, 2011 I use these. Very bright. 3 lights backwards and one either side for side view.http://images2.bidorbuy.co.za/thumbnail/384/404384-1616584936-b.gif A few manufacturers brand the same thing with their logos. Unbranded they go for about R60 but I could not find them and had to fork out R130 for a Rav-X one. The reason why I did take the overpriced one was because I use one light on 2 bikes and don't want to move brackets. If I bought another brand/design, I would have had to get another clamp which normally means a complete set. I use these ones too. Installed 2 on my seatpost, each angled away from centre by a couple degrees, i.e. one slightly to the left and the other to the right. And both on rapid flash. I'm properly lit up.
raptor Posted June 9, 2011 Posted June 9, 2011 I use 2 of the small ravx lights on my road bike, on on either side of the wheel here is a pic on my old bike. http://i232.photobucket.com/albums/ee122/graaf01/IMG00182-20110308-1547.jpg
Weight Weenie Posted June 9, 2011 Posted June 9, 2011 I have a Serfas light that fits under the seat, but maybe it will still be too big and you wont be able to get the bottle out
Tankman Posted June 9, 2011 Posted June 9, 2011 (edited) I have a Serfas light that fits... Snap! And it is bright I tell you! Edited June 9, 2011 by Tankman
BlinkFan Posted June 9, 2011 Posted June 9, 2011 (edited) 2 x LED's. 50m no problem YES problem! A car traveling at 120km/h takes 80m to stop. That means he would have to start breaking 30m before he can even see you Bike speed in meters per second = 8.3 m/s (30km/h)Car speed in meters per second = 33.3m/s (120km/h)v = final velocity (m/s)u = initial velocity (m/s)a = acceleration (m.s^(-2))x = distance (meters) Calculate (de-)acceleration of car, assuming it can come to a dead stop in 80 meters (assume constant (de-)acceleration): v^2 = u^2 + 2ax0^2 = 33.3^2 + 2*a*80a = -6.935m.s^(-2) Now calculate the distance the car covers when braking from 120km/h until it reaches 30km/h: v^2 = u^2 + 2*a*x8.3^2 = 33.3^2 + 2*(-6.935)*xx = 74.98m This means that the car is driving at the same speed as the bike after 74.98 meters. Now calculate how long it took the car to cover the 74.98m: x = ((u+v)/2) t74.98 = ((33.3+8.3)/2) tt = 3.6s Now calculate the distance the bike covers in 3.6 seconds: x = 8.3*3.6x = 29.88m This means by the time the bike and car are travelling at the same speed, the bike is still 4.9m ahead of the car. Edited June 9, 2011 by BlinkFan
scuzzy Posted June 9, 2011 Author Posted June 9, 2011 Snap! And it is bright I tell you! Now that is pretty cool, will definately look for that option. Would love to fit something to the seatstays but not sure how. One would have to use some sort of bracket, maybe something used for a clip on saddle bag. I think Tankman's option is quite cool
Sepia Posted June 9, 2011 Posted June 9, 2011 (edited) I use two Knog on the side stays, one on the rear hub (lights up everything!) one on the helmet, one on the handle bars and a 808 Magilight . I think if I get hit I will be to blame. It is like a circus out there and I am still petrified. Looking to put reflective tape on side stays and my gear to help the lights reflect even more. No such thing as overkill!!!!!!!!!! I think the Knog lights will fit on almost anything, under seat, around bottles (use O rings/elastics to lengthen the stretch. Edited June 9, 2011 by Sepia
Weight Weenie Posted June 9, 2011 Posted June 9, 2011 Tankman nope its not the same one, mine has multiple leds, on the side as well, straps onto the seat rails, charges via usb
Tumbleweed Posted June 10, 2011 Posted June 10, 2011 I use two Knog on the side stays, one on the rear hub (lights up everything!) one on the helmet, one on the handle bars and a 808 Magilight . I think if I get hit I will be to blame. It is like a circus out there and I am still petrified. Looking to put reflective tape on side stays and my gear to help the lights reflect even more. No such thing as overkill!!!!!!!!!! I think the Knog lights will fit on almost anything, under seat, around bottles (use O rings/elastics to lengthen the stretch. That's what I've done on my 29er. Love Knog.
Tankman Posted June 10, 2011 Posted June 10, 2011 Now that is pretty cool, will definately look for that option. Would love to fit something to the seatstays but not sure how. One would have to use some sort of bracket, maybe something used for a clip on saddle bag. I think Tankman's option is quite cool This will give you a better view of the bracket. I have two of these brackets, one on the mtb and one on the road bike. Whenever I swop bikes, I just move the light over! It has 3 LED's, concentrated and it is bright! Uses 3x AAA batteries On the mtb, I flipped the bracket over and put it just below the seatpost clamp. It goes around there easy enough. Added a piece of old tube around the frame and seatpost on the road bike, so no scratching! ... and a 808 Magilight . Magilight ... dam Chinese and their spelling
Skott5 Posted June 10, 2011 Posted June 10, 2011 Awesome Blinkfan, my daughter needs some extra maths lessons .. how much do you charge I don't want a car to stop when he see's my flashing red light, just to drive around me and not over me.
Tankman Posted June 10, 2011 Posted June 10, 2011 No need to worry, according to Blinkfans calculation, at some point you will be traveling at the same speed as the car. (when flying over the roof) If we can outride cars, why not dogs?
Harry Potter Posted June 10, 2011 Posted June 10, 2011 Here I am sitting reading through this tread when suddenly i'm blinded by a red serfas light!!! i need to sew someone
chris_w_65 Posted June 10, 2011 Posted June 10, 2011 This will give you a better view of the bracket. I have two of these brackets, one on the mtb and one on the road bike. Whenever I swop bikes, I just move the light over! It has 3 LED's, concentrated and it is bright! Uses 3x AAA batteries On the mtb, I flipped the bracket over and put it just below the seatpost clamp. It goes around there easy enough. Added a piece of old tube around the frame and seatpost on the road bike, so no scratching! Magilight ... dam Chinese and their spelling Is that a Chinarello?
Tankman Posted June 10, 2011 Posted June 10, 2011 Is that a Chinarello? Nope, it was imported from Pizza & Pasta land. You know, where they Play with their Pina's!
BlinkFan Posted June 10, 2011 Posted June 10, 2011 Awesome Blinkfan, my daughter needs some extra maths lessons .. how much do you charge If you're willing to fly me up I won't charge that much
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