James.Parr Posted April 2, 2023 Report Share Posted April 2, 2023 After the rear hub gave up on me on the Barcelona trip I thought it’s time to give her a makeover whilst the rear wheel was getting re built. Weight coming in at about 9.3kg. apart from titanium bolts no where else I’d really want to save much more weight. 10 Quote Link to comment Share on other sites More sharing options...
trialscrab Posted October 9 Report Share Posted October 9 Hey James, can you share what you did to get the weight down on your Hex? Thanks! Quote Link to comment Share on other sites More sharing options...
James.Parr Posted Thursday at 09:42 PM Author Report Share Posted Thursday at 09:42 PM On 10/9/2024 at 9:30 PM, trialscrab said: Hey James, can you share what you did to get the weight down on your Hex? Thanks! Pretty standard components . My tensioner is a custom made 3D printed one I created. It was set up tubeless and the tyres helped too! Plastic pedals combined with cranks with an aluminium axle is good. Maguras are really lightweight brakes too. My new set up is heavier but is the best I’ve had so far 1 Quote Link to comment Share on other sites More sharing options...
La Bourde Posted Thursday at 10:59 PM Report Share Posted Thursday at 10:59 PM I think the light bicycles rims combined to tubeless billy bonkers saved a lot of weight. The combo seat is also many hundred gramms lighter than a pivotal or tripod one, for only a few bucks. Quote Link to comment Share on other sites More sharing options...
Sam Song Posted Friday at 07:58 PM Report Share Posted Friday at 07:58 PM 20 hours ago, La Bourde said: I think the light bicycles rims combined to tubeless billy bonkers saved a lot of weight. The combo seat is also many hundred gramms lighter than a pivotal or tripod one, for only a few bucks. You will need to install a tubeless insert on the rear with that tire. Otherwise you will be hitting the rim very easily. Quote Link to comment Share on other sites More sharing options...
La Bourde Posted Friday at 08:51 PM Report Share Posted Friday at 08:51 PM I agree. You can ride with a lot of pressure too. The sidewalls are similar to the previous Schwable Table top, very thin. That's the only way to a get a tire that light. Quote Link to comment Share on other sites More sharing options...
Sam Song Posted Friday at 11:06 PM Report Share Posted Friday at 11:06 PM (edited) I have no idea how mine weighs barely below 9.9kg and yours is 9.3kg. My Barzo tires weigh in at 700 grams each and your Billy Bonkers weight ~580 grams each (per Tarty). That only makes a difference for ~240 grams for both tires. I have a Rimpact insert that weighs 90 grams, so all together i should have ~350 grams more in the wheels. You have your custom tensioner whereas mine is a stock Inspired one. But I doubt the weight difference would be that much. But I have Canecreek Eewing cranks, Stamp 11 Ti pedals, E6 BMX one piece seat with shaved off post (weighs 94 grams), and 7 inch rotors instead of 8 inch rotors on your Hex. I can't even think of anywhere else I would save weight other than if I went with carbon forks, carbon handlebar which would change the geometry too. Edited Friday at 11:09 PM by Sam Song Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted Saturday at 05:25 AM Report Share Posted Saturday at 05:25 AM Would hazard a guess at differences in calibration / accuracy of the two different sets of scales. Quote Link to comment Share on other sites More sharing options...
La Bourde Posted Saturday at 02:47 PM Report Share Posted Saturday at 02:47 PM As Sam Song noticed, I think that James's bike weights more than the measured 9,3kg. His scale is surely off. 9,3kg is really light for a street trials. @Sam Song: what about titanium screws? It does not make a huge difference though. Quote Link to comment Share on other sites More sharing options...
Sam Song Posted Saturday at 06:28 PM Report Share Posted Saturday at 06:28 PM 3 hours ago, La Bourde said: As Sam Song noticed, I think that James's bike weights more than the measured 9,3kg. His scale is surely off. 9,3kg is really light for a street trials. @Sam Song: what about titanium screws? It does not make a huge difference though. Everything is titanium except for brake bolts (by choice, for extra peace of mind). So with a pretty much maxed out Hex build, I am still barely below 10kg, which is pretty impressive but still heavier than what others are posting. Quote Link to comment Share on other sites More sharing options...
SergeL Posted Saturday at 10:13 PM Report Share Posted Saturday at 10:13 PM 3 hours ago, Sam Song said: Everything is titanium except for brake bolts (by choice, for extra peace of mind). So with a pretty much maxed out Hex build, I am still barely below 10kg, which is pretty impressive but still heavier than what others are posting. How about carbo fork & handlebar? Extention's street fork is available separately AFAIK. Quote Link to comment Share on other sites More sharing options...
Sam Song Posted Sunday at 12:05 AM Report Share Posted Sunday at 12:05 AM (edited) 1 hour ago, SergeL said: How about carbo fork & handlebar? Extention's street fork is available separately AFAIK. Extention is a shady company to deal with. I talked to them via Facebook asking to buy a fork from them directly and never heard back after them telling me they would get back to me. Their fork will make the head angle a bit steeper and the bike a bit shorter. I find the current geo with the Inspired fork to be a good mix between street and trials. I am not sure I want to make it streetier with the Extention fork. Lastly, I really shouldn't make any complaints about my Hex. Hahaha The bike is more than good enough and light enough in reality. It is entirely my shortcoming for not making the moves I can't do on that Hex. Edited Sunday at 12:08 AM by Sam Song Quote Link to comment Share on other sites More sharing options...
Szymon Posted Monday at 08:02 AM Report Share Posted Monday at 08:02 AM Magura brakes are about 100g lighter then others. Maybe more. Spokes? Double butted + alu nipples = -100g OEM chain tansioner + longer chain is probalby 30g hevier. Quote Link to comment Share on other sites More sharing options...
Ross McArthur Posted Monday at 08:07 AM Report Share Posted Monday at 08:07 AM On 10/13/2024 at 1:05 AM, Sam Song said: Extention is a shady company to deal with. I talked to them via Facebook asking to buy a fork from them directly and never heard back after them telling me they would get back to me. Oh yea, they sound well shady 1 Quote Link to comment Share on other sites More sharing options...
Sam Song Posted Monday at 12:47 PM Report Share Posted Monday at 12:47 PM 4 hours ago, Szymon said: Magura brakes are about 100g lighter then others. Maybe more. Spokes? Double butted + alu nipples = -100g OEM chain tansioner + longer chain is probalby 30g hevier. Spokes are cx rays and nipples are aluminum already. I don't think the difference between the disc brakes is that much. Tarty quotes Hope trials brake weight at 289 grams and Magura MT7 weight at 277 grams. That's barely more than 10 grams difference in weight. Quote Link to comment Share on other sites More sharing options...
Szymon Posted 17 hours ago Report Share Posted 17 hours ago (edited) You're right, they weigh similarly. My fourplay weighs 9.15kg. I don't have carbon parts or titanium cranks. Hex on carbon rims may weigh the same. Edited 17 hours ago by Szymon Quote Link to comment Share on other sites More sharing options...
Sam Song Posted 5 hours ago Report Share Posted 5 hours ago (edited) 13 hours ago, Szymon said: You're right, they weigh similarly. My fourplay weighs 9.15kg. I don't have carbon parts or titanium cranks. Hex on carbon rims may weigh the same. I think as stated by @La Bourde, it is likely that your scale is off. As 9.15kg would be very light for street trials. A standard Fourplay Team build weighs 10.38kg. Are the parts that different from the Team build to make for 1.2kg worth of weight difference without carbon or titanium parts? https://www.tartybikes.co.uk/24_inch_trials_bikes/inspired_fourplay_team_2023/c50p14124.html?pos=4586.22216796875&search_params=YTo4OntzOjg6ImluX3N0b2NrIjtpOjA7czoxMjoiY2F0ZWdvcnlfaWRzIjthOjE6e2k6MDtzOjI6IjUwIjt9czoxNjoiY2F0ZWdvcnlfcmVjdXJzZSI7YjoxO3M6ODoia2V5d29yZHMiO3M6MDoiIjtzOjk6ImJyYW5kX2lkcyI7TjtzOjQ6Im1vZGUiO3M6MzoiYWxsIjtzOjQ6InNvcnQiO3M6OToicHJpY2VfYXNjIjtzOjEwOiJjb3VudHJ5X2lkIjtzOjI6IjQxIjt9 Edited 3 hours ago by Sam Song Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.