Hi,
does anyone know if there is an option to see the fork crown clearance in regards to tire and fender? I know abou the "fork crown clearance" button in the fork dimension dialog box, but this doesn't show the tire or fender. but couldn't find anything
I use the stays auxillary view to see this for the rear triangle, but missing this option for the fork.
If this option doesn't exist, I think it would be a very helpful feature. ;)
thanks,
Dan
The current setup just isn't all that helpful for designing forks.
Ten years ago, there was a related discussion about this. The dimensions mentioned then are available in the Fork tab of the dimensions dialog box. They're labeled Tire clearance/ interference at back of crown and Tire clearance/ interference at front of crown. If there are other things you'd like added to the fork dialog box, I may be more capable of addressing that now than I was ten years ago.
Thanks for the reply. After searching the forum I did discover that thread and then located the option in the dimensions tab. This defintiely helps, but IMHO it would be good to add the fender clearance dimension as well. For now, I just add the C Value from Fender dialog box and leave some extra room for a daruma or whatever attachment I'm going to use.
I thought the crown clearance tool used to display the wheel? I'm possibly misremembering. I'm a visual person, I need a view with the fender and tire. The rear auxilliary views are beyond awesome now, but in contrast, designing a fork involves a certain amount of guessing. Every time I design a fork in bikecad I am disappointed and wish there was a visual tool to help me.
I suppose I should take the time to build some parts in a solid modeler
The initial idea behind the fork crown clearance view was to help determine if there would be interference between the down tube and the adjuster knobs on suspension forks. Because suspension fork crowns usually position the stanchions to the side but also slightly forward, you'll find that the worst case scenario for fork and downtube interference does not occur when the handlebars are turned 90° but rather when they are turned slightly more than 90°. Therefore, when presenting the fork crown clearance view for a suspension fork, you are not looking squarely at the fork and wheel. This makes showing the wheel a little awkward.
Having said that, when designing rigid forks in BikeCAD, the fork crown clearance view does represent the view of the fork turned 90°. Therefore, I could present a true frontal view of the wheel. However, my next challenge is to present a view that isn't misleading. Below are 3 cross sectional views of the fork which would each give a different perspective on fork and fender and tire clearance. Maybe this isn't a great excuse, but my reluctance to show any of these cross sections in the fork crown clearance view is out of concern for how any one of these could be misinterpreted. Currently, this information can also be seen from the side which is where I thought it could be best evaluated. The 21mm and 10mm clearance dimensions are available in the fork dimensions tab of the dimensions dialog box.
thanks for chiming in on this. I think this would be a really helpful feature.
I understand your concern, but seeing I fender 99.9% of my bikes, I would say the most critical for fender / fork crown clearance and getting a good visual for overall position is the front or cross section C. IMHO this would suffice for most builders.
Please consider implementing this.
thanks!
I've just added this cross sectional view to the next update of BikeCAD. Thanks for the feedback.
amazing! thanks so much! will it be possible to see the corrssponding clearance dimensions as well?
I've added the following dimensions to show fender clearance in the front and the back. Let me know if you'd like any other specific dimensions.
That looks very helpful.
thanks so much. I can't wait for the next update!