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1971 DT1-250 Front Wheel Tyre Size Question

  • Syd
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Hello - Just a quick question about my front wheel tyre

The front wheel tyre on my 71 DT1 250 is 19 x 3.25. Would it be ok to fit a smaller size 19 x 2.75 tyre compared the original 3.25 wide tyre?
20 Feb 2023 13:42 #1

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Replied by SKYDANCER46 on topic 1971 DT1-250 Front Wheel Tyre Size Question

You can but it will look funny and may not handle as well. 3.25x19 original style tires are still avaliable from 2 or 3 tire makers. One of them is Heidenau K67 trial tire. I buy them from Revzilla SKU: 1096078

1970 DT250C
20 Feb 2023 15:51 #2

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  • Syd
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Thanks for your comments - the alternative option I have is to fit a larger size 19 x 3.5 tyre rather rather than a 19 x 3.25 size tyre which are hard to get in New Zealand. I'm looking at Shinko SR241 tyres which seem to have a good rating.
20 Feb 2023 16:18 #3

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Replied by SKYDANCER46 on topic 1971 DT1-250 Front Wheel Tyre Size Question

I have used Shinkos and they are a good tire as well. I have a friend that has the 3.50x19 Shinko's on many of his older restored Yamaha's. There show bikes and the tire does fit but not sure how it performs when riding. I have used the larger 3.50x18 Shinko front tire on the 71 Yamaha CT1 175 and it worked fine on that bike. 

1970 DT250C
Last edit: 20 Feb 2023 16:55 by SKYDANCER46.
20 Feb 2023 16:54 #4

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  • Syd
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Thanks, I try the Shinko 19 x 3.5 on the front and see how it goes
21 Feb 2023 01:02 #5

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Replied by AirborneSilva on topic 1971 DT1-250 Front Wheel Tyre Size Question

I have the Shinko 3.5 on my DT2, it works just fine.
2023 Tenere T7
1976 DT400C
1975 DT400
1981 DT175H
1972 DT2 250
1980 GT80
1972 JT2
21 Feb 2023 02:25 #6

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Might be something in a metric option--or not. I just copied this out of the link below.
90/90 MJ90 2.75/3.00
100/90 MM90 3.25/3.50
www.mad-ducati.com/Technical/TireInfo/TireChart.html
I've got what i think is an adventure tyre in metric & think it's a 90/90--19. Bought it for my DT1 front but haven't had to use bit yet but decided it looked undersize as soon as i got it home lol. So looking at the comparison list i guess 100/90 is close without eyeballing one.
Found a [very expensive option] on Trademe. Doesn't look like an original trail/trials tyre but listed as an enduro front tyre. www.trademe.co.nz/a/motors/motorbikes/pa...8767401?bof=orTYQynD
21 Feb 2023 03:36 #7

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  • Syd
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Thanks for the info gents
21 Feb 2023 10:49 #8

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Replied by Pedalcrazy on topic 1971 DT1-250 Front Wheel Tyre Size Question

The 3.5 look to chunky to me but I don’t mind spending a little extra for the Heidenau tires like SKYDANCER mentioned. I have those on all my bikes designed for  the 3.25.
1978 DT400E
1976 DT400C
1973 RT3
1971 RT1B
1968 DT1 (3)
Last edit: 24 Feb 2023 14:20 by Pedalcrazy.
24 Feb 2023 14:19 #9

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  • Tom P
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" Skydancer: I have used the larger 3.50x18 Shinko front tire on the 71 Yamaha CT1 175 and it worked fine on that bike. "

Did you put a larger tire on the back, or is it 3.50 as well? For my '71 CT-1 I went with 3.00x18 on front, and 3.50x18 on back, both Shinko 241s. Original front was 3.25.
24 Feb 2023 15:06 #10

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