Print Page | Close Window

Chain Guard for BHPC races

Printed From: BHPC Forum
Category: Public: Open to anyone
Forum Name: Building
Forum Description: Anything to do with building HPVs
URL: http://forum.bhpc.org.uk/forum_posts.asp?TID=6885
Printed Date: 29 March 2020 at 6:21am
Software Version: Web Wiz Forums 11.02 - http://www.webwizforums.com


Topic: Chain Guard for BHPC races
Posted By: SamB
Subject: Chain Guard for BHPC races
Date Posted: 13 April 2019 at 6:01pm
Hi All

First post on here. 

I'm hoping to make it down to the BHPC race at Hillingdon on the 5th of May. I've been reading the guidance on the "How to race with BHPC" page, specifically regarding the necessity for a chain guard to be fitted in order to race. My bike doesn't have one of these, and it feels buying one will be easier that trying to make one. I'm wanting to check that something like this would be OK before investing. I've attached a photo of the chain ring on my High Baron, looks like it's compatible. Has anyone got any experience in fitting these? looks like I can just bolt it over the top of the 50 tooth ring on the spider. I guess I may need to move the derailleur back to fit it in.

Any thoughts appreciated and hope to see you down there!

uploads/2905/chain_ring.jpg


uploads/2905/chain_guard.jpg

The chain guard is from Taiwan via eBay sellers












Replies:
Posted By: SamB
Date Posted: 13 April 2019 at 6:04pm
I don't know if the images are displaying, so here is the link to the chain guard that I am refering to

https://www.ebay.co.uk/i/151129450988?rt=nc&_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D2%26asc%3D20160908110712%26meid%3D4d514bbe53fc431f804a6bde6914b566%26pid%3D100677%26rk%3D7%26rkt%3D30%26sd%3D262764984004%26itm%3D151129450988 - https://www.ebay.co.uk/i/151129450988?rt=nc&_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D2%26asc%3D20160908110712%26meid%3D4d514bbe53fc431f804a6bde6914b566%26pid%3D100677%26rk%3D7%26rkt%3D30%26sd%3D262764984004%26itm%3D151129450988


Posted By: AlanGoodman
Date Posted: 13 April 2019 at 6:26pm
Hi Sam,
You weren't able to post pictures earlier as all new accounts are "moderated" because we've had spam issues in the past.
I've changed your status now to "visitor" (if you're a BHPC member please let us know and we'll add you to the member's group).

Those chainguards are fine.
All we need is something to prevent any pointy bits from stabbing other competitors or innocent bystanders.

Look forward to seeing you at Hillingdon!!



-------------



Posted By: SamB
Date Posted: 14 April 2019 at 8:28pm
Thanks Alan, hope I can make it down!

BTW, rather off topic - I'm not currently a BHPC member. Can I just turn up on the day, pay the £10 race fee in cash, register for the race and pick up race number there and then? or do I need to do anything in advance?




Posted By: AlanGoodman
Date Posted: 14 April 2019 at 8:43pm
Hi,
Yes, you can just turn up and we'll give you a number on the day - If you are definitely coming, let us know before and we can allocate a number so that you can stick it on your bike before you arrive.
Members race for £7 and get the club magazine, so if you are doing two or more races then membership (at £6 if you only want PDF versions of the magazines) is a bit of a no-brainer.
You will be able to join at Hillingdon or online via the shop if you wish.




-------------



Posted By: SamB
Date Posted: 14 April 2019 at 10:13pm
Great, thanks Alan


Posted By: SamB
Date Posted: 18 April 2019 at 8:18pm
Ok, so after talking to a local bike shop it sounds like the chain guardI put in my previous post don't work well with racing cranks and can interfere with the derailleur. I don't know if anyone has experience of fitting one of these style of chain rings? 

So as I am fairly handy with CAD, my plan B is to 3D-print something similar in style to the attached which I have taken from the BHPC chain guard gallery. My question is this - would this acceptably safe if printed in thick PLA plastic?








Posted By: AlanGoodman
Date Posted: 18 April 2019 at 8:30pm
Racing cranks?
No idea what they are on about (and I suspect they havn't got a clue either).

Anything that covers the pointy bits will be ok as far as the rule goes but beware if it's too thin/flexible the wind will blow it against the chainring once you get up to speed.

It will make a really cool sound though...




-------------



Posted By: SamB
Date Posted: 18 April 2019 at 10:41pm
Thanks Alan

Thanks for the advice, I'll make it thick enough to not flex (even though I do like cool noises!)






Posted By: AlanGoodman
Date Posted: 18 April 2019 at 10:44pm
Thumbs Up

-------------



Posted By: RoyMacdonald
Date Posted: 19 April 2019 at 2:47pm
Originally posted by SamB SamB wrote:

Ok, so after talking to a local bike shop it sounds like the chain guardI put in my previous post don't work well with racing cranks and can interfere with the derailleur. I don't know if anyone has experience of fitting one of these style of chain rings? 

So as I am fairly handy with CAD, my plan B is to 3D-print something similar in style to the attached which I have taken from the BHPC chain guard gallery. My question is this - would this acceptably safe if printed in thick PLA plastic?







What is a racing crank??? They just didn't want to fit it. 

I've got one of those chain guards and they fit fine and come with all the bits and everything seems high quality. Takes about 10 mins to fit. No reason for it to interfere with the derailleur if it's the right size. Maybe I should add the size is stamped on the chain guard and should correspond to the size stamped on your biggest chain ring.

Roy


Posted By: SamB
Date Posted: 04 May 2019 at 11:33am
Thanks Roy that's really useful to know, sorry I didn't see your message before as I haven't been on here.



Print Page | Close Window

Forum Software by Web Wiz Forums® version 11.02 - http://www.webwizforums.com
Copyright ©2001-2015 Web Wiz Ltd. - http://www.webwiz.co.uk